A. Christophersen

发表

H. Gjerde, A. Christophersen, J. Mørland, 1992 .

Automated sample preparation by on-line dialysis and trace enrichment. Analysis of morphine, 6-monoacetylmorphine, codeine, ethylmorphine and pholcodine in plasma and whole blood by capillary gas chromatography and capillary gas chromatography-mass spectrometry.

A. Christophersen, M. Krogh, K. Rasmussen, 1993, Journal of chromatography.

Prevalence of alcohol and drugs among motorcycle riders killed in road crashes in Norway during 2001-2010.

Hallvard Gjerde, Asbjørg S Christophersen, H. Gjerde, 2015, Accident; analysis and prevention.

DRIVING UNDER THE INFLUENCE OF ALCOHOL AND OTHER DRUGS IN NORWAY

Jørg Mørland, A. Christophersen, J. Mørland, 1996 .

Determination of benzodiazepines in human urine using solid-phase extraction and high-performance liquid chromatography-electrospray ionization tandem mass spectrometry.

A. Christophersen, S. Hegstad, E. Øiestad, 2006, Journal of analytical toxicology.

Detection Times of Diazepam, Clonazepam, and Alprazolam in Oral Fluid Collected From Patients Admitted to Detoxification, After High and Repeated Drug Intake

A. Christophersen, V. Vindenes, E. Øiestad, 2015, Therapeutic drug monitoring.

Detection of drugs of abuse in simultaneously collected oral fluid, urine and blood from Norwegian drug drivers.

H. Gjerde, A. Christophersen, V. Vindenes, 2012, Forensic science international.

Oral fluid is a viable alternative for monitoring drug abuse: detection of drugs in oral fluid by liquid chromatography-tandem mass spectrometry and comparison to the results from urine samples from patients treated with Methadone or Buprenorphine.

A. Christophersen, J. Mørland, H. Waal, 2011, Journal of analytical toxicology.

The implementation of per-se limits for driving under the influence of benzodiazepines and related drugs: No increased risk for arrest during therapeutic use in Norway

H. Gjerde, A. Christophersen, J. Mørland, 2020, Traffic injury prevention.

Prevalence of alcohol use among road traffic crash victims presenting to a Malawian Central Hospital: A cross-sectional study

H. Gjerde, A. Christophersen, S. T. Bogstrand, 2020, Traffic injury prevention.

Rapid quantification of buprenorphine-glucuronide and norbuprenorphine-glucuronide in human urine by LC-MS-MS.

A. Christophersen, S. Hegstad, E. Øiestad, 2007, Journal of analytical toxicology.

Screening of synthetic cannabinoids in preserved oral fluid by UPLC-MS/MS.

A. Christophersen, U. Johansen, E. L. Oiestad, 2013, Bioanalysis.

Norwegian Roadside Survey of Alcohol and Drug Use by Drivers (2008–2009)

H. Gjerde, A. Christophersen, J. Mørland, 2013, Traffic injury prevention.

Prevalence of Alcohol and Drugs Among Car and Van Drivers Killed in Road Accidents in Norway: An Overview From 2001 to 2010

H. Gjerde, A. Christophersen, 2014, Traffic injury prevention.

Prevalence of driving with blood drug concentrations above proposed new legal limits in Norway: estimations based on drug concentrations in oral fluid.

H. Gjerde, A. Christophersen, J. Mørland, 2011, Forensic science international.

Mortality among subjects previously apprehended for driving under the influence of traffic-hazardous medicinal drugs.

Asbjørg S Christophersen, A. Christophersen, S. Skurtveit, 2005, Drug and alcohol dependence.

Trends in amphetamine and benzodiazepine use among drivers arrested for drug impaired driving in Norway 2000-2009

A. Christophersen, S. T. Bogstrand, G. Middelkoop, 2011 .

Rearrest rates among Norwegian drugged drivers compared with drunken drivers.

A. Christophersen, S. Skurtveit, M. Grung, 2002, Drug and alcohol dependence.

Relationship between drug plasma concentrations and psychomotor performance after single doses of ethanol and benzodiazepines

A. Christophersen, J. Mørland, R. Bjørklund, 2005, Psychopharmacology.

Ethylmorphine O-deethylation in isolated rat hepatocytes. Involvement of codeine O-demethylation enzyme systems.

A. Christophersen, J. Mørland, A. Bjørneboe, 1995, Biochemical pharmacology.

A Norwegian study of the suitability of hair samples in epidemiological research of alcohol, nicotine and drug use.

H. Gjerde, A. Christophersen, H. M. Lund, 2013, Journal of analytical toxicology.

Electromembrane extraction of stimulating drugs from undiluted whole blood.

Lars Erik Eng Eibak, A. Christophersen, R. G. Jamt, 2012, Journal of chromatography. A.

Using biological samples in epidemiological research on drugs of abuse

H. Gjerde, A. Christophersen, E. Øiestad, 2011 .

Frequency of illegal drugs and medicines in a Norwegian road-side survey

H. Gjerde, A. Christophersen, T. Assum, 2007 .

Comparison between the urinary alcohol markers EtG, EtS, and GTOL/5-HIAA in a controlled drinking experiment.

A. Christophersen, J. Mørland, A. Helander, 2008, Alcohol and alcoholism.

Determination of heroin and its main metabolites in small sample volumes of whole blood and brain tissue by reversed-phase liquid chromatography-tandem mass spectrometry.

A. Christophersen, J. Mørland, R. Karinen, 2009, Journal of analytical toxicology.

A comparison of alcohol and drug use by random motor vehicle drivers in Brazil and Norway.

H. Gjerde, A. Christophersen, J. Mørland, 2014, The International journal on drug policy.

Drug screening of hair by liquid chromatography-tandem mass spectrometry.

A. Christophersen, N. Kunøe, P. Lobmaier, 2008, Journal of analytical toxicology.

Associations between substance use among car and van drivers in Norway and fatal injury in road traffic accidents

H. Gjerde, A. Christophersen, P. T. Normann, 2013 .

Drugs of abuse in oral fluid collected by two different sample kits--stability testing and validation using ultra performance tandem mass spectrometry analysis.

H. Gjerde, A. Christophersen, E. Øiestad, 2011, Journal of chromatography. B, Analytical technologies in the biomedical and life sciences.

Drug screening of whole blood by ultra-performance liquid chromatography-tandem mass spectrometry.

A. Christophersen, U. Johansen, E. L. Oiestad, 2011, Journal of analytical toxicology.

Drug analysis for control purposes in forensic toxicology, workplace testing, sports medicine and related areas.

A. Christophersen, J. Mørland, 1994, Pharmacology & toxicology.

Detection Time for THC in Oral Fluid After Frequent Cannabis Smoking

A. Christophersen, V. Vindenes, E. Øiestad, 2014, Therapeutic drug monitoring.

Adult pedestrian and cyclist injuries in Lilongwe, Malawi: a cross-sectional study

H. Gjerde, A. Christophersen, G. Mulima, 2020, Malawi medical journal : the journal of Medical Association of Malawi.

Determination of cotinine in pericardial fluid and whole blood by liquid chromatography-tandem mass spectrometry.

A. Christophersen, J. Mørland, A. Stray‐Pedersen, 2009, Journal of analytical toxicology.

Ethyl glucuronide in hair compared with traditional alcohol biomarkers--a pilot study of heavy drinkers referred to an alcohol detoxification unit.

A. Christophersen, J. Mørland, G. Høiseth, 2009, Alcoholism: Clinical and Experimental Research.

Geographical mapping of road traffic injuries in Lilongwe, Malawi.

H. Gjerde, A. Christophersen, J. Madsen, 2021, Injury.

Toxicological investigations of drivers killed in road traffic accidents in Norway during 2006-2008.

H. Gjerde, A. Christophersen, J. Mørland, 2011, Forensic science international.

[Effect and occurrence of synthetic cannabinoids].

A. Christophersen, V. Vindenes, E. Øiestad, 2012, Tidsskrift for den Norske laegeforening : tidsskrift for praktisk medicin, ny raekke.

Blood kinetics of ethyl glucuronide and ethyl sulphate in heavy drinkers during alcohol detoxification.

A. Christophersen, J. Mørland, G. Høiseth, 2009, Forensic science international.

A pharmacokinetic study of ethyl glucuronide in blood and urine: applications to forensic toxicology.

A. Christophersen, J. Mørland, A. Helander, 2007, Forensic science international.

A study of ethyl glucuronide in post-mortem blood as a marker of ante-mortem ingestion of alcohol.

A. Christophersen, J. Mørland, G. Høiseth, 2007, Forensic science international.

Determination of amphetamine and methamphetamine in blood by derivatization with perfluorooctanoyl chloride and gas chromatography/mass spectrometry.

H. Gjerde, A. Christophersen, I. Hasvold, 1993, Journal of analytical toxicology.

Naltrexone Implants – Duration, Tolerability and Clinical Usefulness

A. Christophersen, J. Mørland, H. Waal, 2006, European Addiction Research.

The prevalence of alcohol and drugs in sampled oral fluid is related to sample volume.

H. Gjerde, A. Christophersen, P. T. Normann, 2010, Journal of analytical toxicology.

Naltrexone implants -- duration, tolerability and clinical usefulness. A pilot study.

A. Christophersen, J. Mørland, H. Waal, 2006, European addiction research.

[Drug testing in hair].

A. Christophersen, S. Hegstad, L. Kristoffersen, 2020, Tidsskrift for den Norske laegeforening : tidsskrift for praktisk medicin, ny raekke.

METHADONE DETECTIONS IN BLOOD SAMPLES FROM APPREHENDED DRUGGED DRIVERS

A. Christophersen, J. Mørland, A. Ripel, 2004 .

International trends in alcohol and drug use among vehicle drivers.

H. Gjerde, A. Christophersen, J. Mørland, 2016, Forensic science review.

Methyl tert‐Butyl Ether (MTBE) Detected in Abnormally High Concentrations in Postmortem Blood and Urine from Two Persons Found Dead Inside a Car Containing a Gasoline Spill

A. Christophersen, I. Morild, V. Vindenes, 2013, Journal of forensic sciences.

Extended Detection of Amphetamine and Methamphetamine in Oral Fluid

A. Christophersen, M. Huestis, Å. Øiestad, 2016, Therapeutic drug monitoring.

Comparison of zopiclone concentrations in oral fluid sampled with Intercept(®) oral specimen collection device and Statsure Saliva Sampler™ and concentrations in blood.

H. Gjerde, A. Christophersen, I. Gustavsen, 2010, Journal of analytical toxicology.

Determination of ethylglucuronide in oral fluid by ultra-performance liquid chromatography- tandem mass spectrometry.

A. Christophersen, J. Mørland, S. Hegstad, 2009, Journal of analytical toxicology.

Determination of digoxin and digitoxin in whole blood.

A. Christophersen, S. Bergan, U. Johansen, 2009, Journal of analytical toxicology.

Disappearance of ethyl glucuronide during heavy putrefaction.

A. Christophersen, J. Mørland, G. Høiseth, 2008, Forensic science international.

Ethyl glucuronide concentrations in oral fluid, blood, and urine after volunteers drank 0.5 and 1.0 g/kg doses of ethanol.

H. Gjerde, A. Christophersen, J. Mørland, 2010, Journal of analytical toxicology.

Levels of ethyl glucuronide and ethyl sulfate in oral fluid, blood, and urine after use of mouthwash and ingestion of nonalcoholic wine.

H. Gjerde, A. Christophersen, G. Høiseth, 2010, Journal of analytical toxicology.

Simultaneous determination of 6 beta-blockers, 3 calcium-channel antagonists, 4 angiotensin-II antagonists and 1 antiarrhythmic drug in post-mortem whole blood by automated solid phase extraction and liquid chromatography mass spectrometry. Method development and robustness testing by experimental d

A. Christophersen, E. Lundanes, M. Krogh, 2007, Journal of chromatography. B, Analytical technologies in the biomedical and life sciences.

Determination of opiates and cocaine in urine by high pH mobile phase reversed phase UPLC-MS/MS.

Thomas Berg, Asbjørg S Christophersen, Elsa Lundanes, 2009, Journal of chromatography. B, Analytical technologies in the biomedical and life sciences.

Morphine to codeine concentration ratio in blood and urine as a marker of illicit heroin use in forensic autopsy samples.

A. Christophersen, J. Mørland, M. Arnestad, 2012, Forensic science international.

Screening for drugs in forensic blood samples using EMIT urine assays.

H. Gjerde, A. Christophersen, J. Mørland, 1990, Forensic science international.

Drugged driving, a review based on the experience in Norway.

J Mørland, A S Christophersen, A. Christophersen, 1997, Drug and alcohol dependence.

Determination of a selection of anti-epileptic drugs and two active metabolites in whole blood by reversed phase UPLC-MS/MS and some examples of application of the method in forensic toxicology cases.

A. Christophersen, V. Vindenes, E. Øiestad, 2015, Drug testing and analysis.

Comparison of ethanol and other drugs of abuse concentrations in whole blood stored in venoject glass and plastic and venosafe plastic evacuated tubes.

A. Christophersen, W. Andresen, E. L. Oiestad, 2010, Journal of Analytical Toxicology.

Carisoprodol intoxications: a retrospective study of forensic autopsy material from 1992–2003

A. Christophersen, J. Mørland, G. Høiseth, 2007, International Journal of Legal Medicine.

Simultaneous determination of common benzodiazepines in blood using capillary gas chromatography.

H. Gjerde, A. Christophersen, E. Dahlin, 1992, Journal of pharmaceutical and biomedical analysis.

Evaluation of a method for simultaneous quantification of codeine, ethylmorphine and morphine in blood.

H. Gjerde, A. Christophersen, H. Gundersen, 1991, Forensic science international.

Alcohol, psychoactive drugs and fatal road traffic accidents in Norway: a case-control study.

Sven Ove Samuelsen, Hallvard Gjerde, Per T Normann, 2011, Accident; analysis and prevention.

Practical use of ethyl glucuronide and ethyl sulfate in postmortem cases as markers of antemortem alcohol ingestion

A. Christophersen, J. Mørland, G. Høiseth, 2010, International Journal of Legal Medicine.

Lethal poisoning with ethiofencarb and ethanol.

A. Christophersen, T. Rognum, R. Karinen, 2009, Journal of analytical toxicology.

Serum/whole blood concentration ratio for ethylglucuronide and ethyl sulfate.

A. Christophersen, J. Mørland, G. Høiseth, 2009, Journal of analytical toxicology.

Drug screening of preserved oral fluid by liquid chromatography-tandem mass spectrometry.

A. Christophersen, E. Øiestad, U. Johansen, 2007, Clinical chemistry.

Comparison of the stability of stock solutions of drugs of abuse and other drugs stored in a freezer, refrigerator, and at ambient temperature for up to one year.

A. Christophersen, E. Øiestad, W. Andresen, 2011, Journal of analytical toxicology.

Identification of opiates in urine by capillary column gas chromatography of two different derivatives.

A. Christophersen, G. Gadeholt, B. Skuterud, 1987, Journal of chromatography.

Ilkka Ojanperä, Jørg Mørland, Robert Kronstrand, 2011, Accident; analysis and prevention.

Amphetamine designer drugs - an overview and epidemiology.

A S Christophersen, A. Christophersen, 2000, Toxicology letters.

Gas chromatographic quantification of underivatized amphetamine in whole blood. Blood stored in plastic containers--a source of error.

A. Christophersen, E. Dahlin, G. Pettersen, 1988, Journal of chromatography.

Comparison of drug concentrations in blood and oral fluid collected with the Intercept sampling device.

H. Gjerde, A. Christophersen, J. Mørland, 2010, Journal of analytical toxicology.

Very long Detection Times after High and repeated intake of Heroin and Methadone, measured in Oral Fluid

A. Christophersen, V. Vindenes, E. Øiestad, 2014 .

Relationship Between Oral Fluid and Blood Concentrations of Drugs of Abuse in Drivers Suspected of Driving Under the Influence of Drugs

A. Verstraete, A. Christophersen, N. Samyn, 2009, Therapeutic drug monitoring.

Determination of hydrochlorothiazide in serum by high-pressure liquid chromatography.

A. Christophersen, K. Rasmussen, B. Salvesen, 1977, Journal of chromatography.

Glass capillary column gas chromatography of phenol-alkylamines after flas-heater derivatization using a double injection technique

A. Christophersen, K. Rasmussen, Egil Hovland, 1982 .

Biotransformation and pharmacokinetics of ethylmorphine after a single oral dose.

J Mørland, A S Christophersen, A. Christophersen, 1995, British journal of clinical pharmacology.

Automated analysis of free and total concentrations of three antiepileptic drugs in plasma with on-line dialysis and high-performance liquid chromatography.

A. Christophersen, M. Krogh, K. Rasmussen, 1995, Journal of chromatography. B, Biomedical applications.

Surveillance of abused drugs in forensic autopsy cases in Norway

A. Christophersen, J. Mørland, M. Arnestad, 2011 .

Frequent Detection of Benzodiazepines in Drugged Drivers in Norway

A. Christophersen, J. Mørland, 2008, Traffic injury prevention.

Morphine formation after intake of ethylmorphine.

A. Christophersen, J. Mørland, A. Ripel, 1992, Pharmacology & toxicology.

Drugged driving in the Nordic countries--a comparative study between five countries.

G Ceder, A S Christophersen, A. Christophersen, 1999, Forensic science international.

Bromadiolone Poisoning: LC–MS Method and Pharmacokinetic Data

A. Christophersen, J. Mørland, V. Vindenes, 2008, Journal of forensic sciences.

Plasma concentrations during naltrexone implant treatment of opiate-dependent patients.

A. Christophersen, J. Mørland, H. Waal, 2004, British journal of clinical pharmacology.

Use of alcohol and drugs by Norwegian employees: a pilot study using questionnaires and analysis of oral fluid

H. Gjerde, A. Christophersen, J. Mørland, 2010, Journal of occupational medicine and toxicology.

Increased mortality among previously apprehended drunken and drugged drivers.

Merete Grung, Asbjørg S Christophersen, Jørg Mørland, 2002, Drug and Alcohol Dependence.

Glass capillary column gas chromatography of carboxylic acids after flash-heater trimethylsilylation

A. Christophersen, K. Rasmussen, F. Tønnesen, 1979 .

Glass capillary column gas chromatography of narcotic drugs after flash-heater trimethylsilylation.

A. Christophersen, K. Rasmussen, 1979, Journal of chromatography.

On-column silylation of β-blocking agents applied to a back-flushable precolumn capillary system

A. Christophersen, K. Rasmussen, 1982 .

Glass capillary column gas chromatography of barbiturates after flash-heater derivatization with dimethylformamide dimethylacetal.

A. Christophersen, K. Rasmussen, 1980, Journal of Chromatography A.

On-column acylation, heart-cutting and electron-capture detection of opiates

A. Christophersen, K. Rasmussen, 1979 .

[Routines upon suspicion of driving under influence].

A. Christophersen, J. Mørland, H. Khiabani, 2007, Tidsskrift for den Norske laegeforening : tidsskrift for praktisk medicin, ny raekke.

Analyses of Beverage Remains in Drug Rape Cases Revealing Drug Residues ‐ The Possibility of Contamination from Drug Concentrated Oral Fluid or Oral Cavity Contained Tablets

A. Christophersen, V. Vindenes, E. Øiestad, 2014, Journal of Forensic Sciences.

The concentrations, appearance and taste of nine sedating drugs dissolved in four different beverages.

A. Christophersen, J. Mørland, I. Gustavsen, 2005, Forensic science international.

Use of alcohol and drugs by employees in selected business areas in Norway: a study using oral fluid testing and questionnaires

H. Gjerde, A. Christophersen, I. Moan, 2015, Journal of Occupational Medicine and Toxicology.

Female drivers suspected for drunken or drugged driving.

A. Christophersen, S. Skurtveit, J. Mørland, 1995, Forensic science international.

International Trends in Alcohol and Drug Use Among Motor Vehicle Drivers *

H. Gjerde, A. Christophersen, J. Mørland, 2020, Alcohol, Drugs, and Impaired Driving.

Drugged drivers in Norway with benzodiazepine detections.

Asbjørg S Christophersen, A. Christophersen, S. Skurtveit, 2002, Forensic science international.

Oral administration of codeine in the presence of ethanol: a pharmacokinetic study in man.

A. Christophersen, J. Mørland, E. Bodd, 1987, Pharmacology & toxicology.

[Driving under the influence of benzodiazepines. Sale differences in the counties are reflected among drivers suspected of driving under the influence of a drug].

A. Christophersen, S. Skurtveit, J. Mørland, 1995, Tidsskrift for den Norske laegeforening : tidsskrift for praktisk medicin, ny raekke.

Prevalence of alcohol and drugs among Norwegian motor vehicle drivers: a roadside survey.

Terje Assum, Magne Aldrin, Hallvard Gjerde, 2008, Accident; analysis and prevention.

Evidence for CYP2D1-mediated primary and secondary O-dealkylation of ethylmorphine and codeine in rat liver microsomes.

A. Christophersen, J. Mørland, A. Bjørneboe, 1997, Biochemical pharmacology.

Interference with analysis of amphetamine in blood by N-ethylbenzenamine from rubber septums.

A. Christophersen, J. Mørland, E. Dahlin, 1988, Journal of analytical toxicology.

Increased population drinking is not always associated with increased number of drink driving convictions.

H. Gjerde, A. Christophersen, J. Mørland, 2013, Addiction.

Reducing the toll of road traffic accidents.

A. Christophersen, C. D. Dunn, 2003, Journal of the Royal Society of Medicine.

The occurrence of drugged driving in Norway - Existing problems and solutions

A. Christophersen, A. S. Christophersen, 2000 .

Recidivism among drunken and drugged drivers in Norway.

A. Christophersen, J. Mørland, S. Skurtveit, 1996, Alcohol and alcoholism.

Characteristics of Drivers Testing Positive for Heroin or Ecstasy in Norway

S Skurtveit, A S Christophersen, A. Christophersen, 2004, Traffic injury prevention.

A comparison of alcohol and drug use by random motor vehicle drivers in Brazil and Norway.

H. Gjerde, A. Christophersen, J. Mørland, 2014, The International journal on drug policy.

Results of workplace drug testing in Norway

A. Christophersen, S. T. Bogstrand, H. M. Lund, 2011 .

Screening for drug use among Norwegian drivers suspected of driving under influence of alcohol or drugs.

H. Gjerde, A. Christophersen, J. Mørland, 1990, Forensic science international.

Prevalence of alcohol and drugs in blood samples from Norwegian drivers involved in road traffic accidents

S Fosser, A Glad, K M Beylich, 1995 .

Driving under the influence of drugs: an increasing problem

A. Christophersen, J. Mørland, A. Bjørneboe, 1995 .

Benzodiazepines, tetrahydrocannabinol and drugged driving in norway

H. Gjerde, A. Christophersen, J. Moerland, 1993 .

Mortality among subjects previously apprehended for driving under the influence of traffic-hazardous medicinal drugs.

A. Christophersen, S. Skurtveit, A. M. Hausken, 2005, Drug and alcohol dependence.

THE ROLE OF MEDICINES IN TRAFFIC ACCIDENTS IN THE EUROPEAN COUNTRIES

A. Christophersen, 2002 .

Study of rearrests for drunken driving in Norway.

A. Christophersen, J. Mørland, S. Skurtveit, 1998, Forensic science international.

Analysis of Alcohol and Drugs in Oral Fluid From Truck Drivers in Norway

H. Gjerde, A. Christophersen, J. Mørland, 2012, Traffic injury prevention.

Comparison of drug concentrations in blood and oral fluid collected with the Intercept sampling device.

H. Gjerde, A. Christophersen, J. Mørland, 2010, Journal of analytical toxicology.

Prevalence of driving with blood drug concentrations above proposed new legal limits in Norway: estimations based on drug concentrations in oral fluid.

H. Gjerde, A. Christophersen, J. Mørland, 2011, Forensic science international.

Prevalence of alcohol and drugs among motorcycle riders killed in road crashes in Norway during 2001-2010.

H. Gjerde, A. Christophersen, 2015, Accident; analysis and prevention.

Ethylmorphine metabolism in isolated rat hepatocytes.

A. Christophersen, J. Mørland, A. Ripel, 1993, Pharmacology & toxicology.

Drugs of abuse in oral fluid collected by two different sample kits--stability testing and validation using ultra performance tandem mass spectrometry analysis.

H. Gjerde, A. Christophersen, E. Øiestad, 2011, Journal of chromatography. B, Analytical technologies in the biomedical and life sciences.