J. Keller

J. Keller, P. Layer, 2005, Clinical gastroenterology and hepatology : the official clinical practice journal of the American Gastroenterological Association.

Enzyme Therapy in Chronic Pancreatitis

J. Keller, P. Layer, 1999 .

Pancreatic enzymes: secretion and luminal nutrient digestion in health and disease.

J. Keller, P. Layer, P. Layer, 1999, Journal of clinical gastroenterology.

The serotonin receptor 3E variant is a risk factor for female IBS-D

R. Spiller, W. Lieb, M. Gazouli, 2022, Journal of Molecular Medicine.

The spectrum and treatment of gastrointestinal disorders during pregnancy

J. Keller, P. Layer, D. Frederking, 2008, Nature Clinical Practice Gastroenterology &Hepatology.

[Esophageal 24 hour-pH metry. Recommendations of the German Society of Neurogastroenterology and Motility and the Study Group for Gastrointestinal Functional Disorders and Function Diagnostics of the Austrian Society of Gastroenterology and Hepatology].

J. Keller, C. Pehl, G. Stacher, 2003, Zeitschrift fur Gastroenterologie.

The perceived effect of various foods and beverages on stool consistency

J. Keller, P. Layer, S. Müller-lissner, 2005, European journal of gastroenterology & hepatology.

Classification of esophageal motor findings in gastro‐esophageal reflux disease: Conclusions from an international consensus group

G. Boeckxstaens, E. Savarino, A. Bredenoord, 2017, Neurogastroenterology and motility : the official journal of the European Gastrointestinal Motility Society.

Pancreatic enzyme supplementation therapy

J. Keller, P. Layer, 2003, Current treatment options in gastroenterology.

Diagnosis of Fat Malabsorption by Breath Tests: Just a Breeze?

J. Keller, 2009, Digestion.

German guideline diverticular disease/diverticulitis

J. Ritz, J. Keller, F. Dumoulin, 2022, United European gastroenterology journal.

Circadian pancreatic enzyme pattern and relationship between secretory and motor activity in fasting humans.

J. Keller, P. Layer, 2002, Journal of applied physiology.

Advances in the diagnosis and classification of gastric and intestinal motility disorders

Michael Camilleri, Carolina Malagelada, Mark Fox, 2018, Nature Reviews Gastroenterology & Hepatology.

Tests of pancreatic exocrine function - clinical significance in pancreatic and non-pancreatic disorders.

J. Mayerle, M. Lerch, J. Keller, 2009, Best practice & research. Clinical gastroenterology.

13C-Mixed Triglyceride Breath Test for Evaluation of Pancreatic Exocrine Function in Diabetes Mellitus

J. Keller, U. Rosien, P. Layer, 2014, Pancreas.

Irritable Bowel Syndrome—The Main

J. Keller, P. Layer, J. Preiß, 2011 .

Effects of 5-hydroxytryptamine (serotonin) type 3 antagonists on symptom relief and constipation in nonconstipated irritable bowel syndrome: a systematic review and meta-analysis of randomized controlled trials.

M. Camilleri, V. Montori, J. Keller, 2008, Clinical gastroenterology and hepatology : the official clinical practice journal of the American Gastroenterological Association.

) 1 AWMF-Registriernummer : 021 / 016 Irritable Bowel Syndrome : German Consensus Guidelines on Definition , Pathophysiology and Management

H. Mönnikes, J. Keller, S. Müller-lissner, 2011 .

Ambulatory reflux monitoring for diagnosis of gastro‐esophageal reflux disease: Update of the Porto consensus and recommendations from an international consensus group

G. Boeckxstaens, E. Savarino, M. Fox, 2017, Neurogastroenterology and motility : the official journal of the European Gastrointestinal Motility Society.

[Efficacy of freeze-dried Lactobacilli in functional diarrhoe: a pilot study].

J. Keller, P. Layer, D. Menge, 2012, Deutsche medizinische Wochenschrift.

[Irritable bowel syndrome: German consensus guidelines on definition, pathophysiology and management].

P. Enck, J. Langhorst, H. Mönnikes, 2011, Zeitschrift fur Gastroenterologie.

German guideline diverticular disease/diverticulitis

A. Schreyer, J. Ritz, J. Keller, 2022, United European gastroenterology journal.

Management of the short bowel syndrome after extensive small bowel resection.

J. Keller, P. Layer, Jutta Keller, 2004, Best practice & research. Clinical gastroenterology.

Tegaserod in the treatment of irritable bowel syndrome (IBS) with constipation as the prime symptom

J. Keller, P. Layer, A. Kreiss, 2007, Therapeutics and clinical risk management.

Efficacy of Budesonide Orodispersible Tablets as Induction Therapy for Eosinophilic Esophagitis in a Randomized Placebo-Controlled Trial.

F. Lammert, M. Vieth, A. Bredenoord, 2019, Gastroenterology.

Intestinal and anorectal motility and functional disorders.

J. Keller, P. Layer, 2009, Best practice & research. Clinical gastroenterology.

United European Gastroenterology evidence-based guidelines for the diagnosis and therapy of chronic pancreatitis (HaPanEU)

M. Boermeester, J. Werner, P. Fockens, 2017, United European gastroenterology journal.

[S3-Consensus guidelines on definition, etiology, diagnosis and medical, endoscopic and surgical management of chronic pancreatitis German Society of Digestive and Metabolic Diseases (DGVS)].

H. Friess, A. Schreyer, J. Izbicki, 2012, Zeitschrift fur Gastroenterologie.

English language version of the S3-consensus guidelines on chronic pancreatitis: Definition, aetiology, diagnostic examinations, medical, endoscopic and surgical management of chronic pancreatitis

H. Friess, J. Werner, A. Schreyer, 2015, Zeitschrift für Gastroenterologie.

Circadian coupling between pancreatic secretion and intestinal motility in humans.

J. Keller, P. Layer, G. Gröger, 2001, American journal of physiology. Gastrointestinal and liver physiology.

Effects of Systemic Administration of a Local Anesthetic on Pain in Acute Pancreatitis: A Randomized Clinical Trial

C. Ell, J. Keller, P. Layer, 2011, Pancreas.

Every slow-wave impulse is associated with motor activity of the human stomach.

Andreas Stallmach, J. Keller, P. Layer, 2009, American journal of physiology. Gastrointestinal and liver physiology.

Diagnosis of chronic pancreatitis

Z. Liao, Wen‐Bin Zou, Jin-Huan Lin, 1979 .

METHODS AND PRINCIPLES OF PANCREATIC FUNCTION TESTS

J. Keller, P. Layer, Henrike von Schassen, 2013 .

Gastric emptying and disease activity in inflammatory bowel disease

C. Beglinger, J. Keller, P. Layer, 2015, European journal of clinical investigation.

Mechanisms of gastric emptying disturbances in chronic and acute inflammation of the distal gastrointestinal tract.

J. Holst, C. Beglinger, J. Keller, 2009, American journal of physiology. Gastrointestinal and liver physiology.

Influence of clinical parameters on the results of 13C‐octanoic acid breath tests: examination of different mathematical models in a large patient cohort

M. Camilleri, J. Keller, P. Layer, 2009, Neurogastroenterology and motility : the official journal of the European Gastrointestinal Motility Society.

Inhibition of human pancreatic and biliary output but not intestinal motility by physiological intraileal lipid loads.

J. Holst, J. Keller, P. Layer, 2006, American journal of physiology. Gastrointestinal and liver physiology.

[Clinically relevant breath tests in gastroenterological diagnostics--recommendations of the German Society for Neurogastroenterology and Motility as well as the German Society for Digestive and Metabolic Diseases].

J. Keller, M. Storr, A. Franke, 2005, Zeitschrift fur Gastroenterologie.

Do Elevated Plasma Vasoactive Intestinal Polypeptide (VIP) Levels Cause Small Intestinal Motor Disturbances in Humans?

J. Keller, C. Fibbe, U. Rosien, 2005, Digestive Diseases and Sciences.

Validation of criteria for the definition of transient lower esophageal sphincter relaxations using high‐resolution manometry

E. Savarino, M. Fox, J. Pandolfino, 2017, Neurogastroenterology and motility : the official journal of the European Gastrointestinal Motility Society.

Clinical measurement of gastrointestinal motility and function: who, when and which test?

M. Camilleri, M. Fox, S. Roman, 2018, Nature Reviews Gastroenterology & Hepatology.

Prolonged measurement improves the assessment of the barrier function of the esophago‐gastric junction by high‐resolution manometry

M. Fox, J. Keller, P. Layer, 2017, Neurogastroenterology and motility : the official journal of the European Gastrointestinal Motility Society.

[Anorectal manometry].

P. Enck, H. Mönnikes, J. Keller, 2007, Zeitschrift fur Gastroenterologie.

Pathophysiology and management of diabetic gastroenteropathy

A. Farmer, A. Drewes, A. Olesen, 2019, Therapeutic advances in gastroenterology.

S2k-Leitlinie Chronische Obstipation: Definition, Pathophysiologie, Diagnostik und Therapie

P. Enck, M. Sailer, H. Mönnikes, 2013, Zeitschrift für Gastroenterologie.

Aalborg Universitet Pathophysiology and management of diabetic

A. Farmer, A. Drewes, A. Olesen, 2019 .

Diabetic neuropathy.

J. Keller, C. Maier, D. Ziegler, 2014, Experimental and clinical endocrinology & diabetes : official journal, German Society of Endocrinology [and] German Diabetes Association.

Simultaneous non-invasive measurement of liquid gastric emptying and small bowel transit by combined 13C-acetate and H2-lactulose breath test

J. Keller, P. Layer, V. Andresen, 2014, Journal of breath research.

European guideline on indications, performance and clinical impact of 13C‐breath tests in adult and pediatric patients: An EAGEN, ESNM, and ESPGHAN consensus, supported by EPC

M. Fox, J. Keller, K. Verbeke, 2021, United European gastroenterology journal.

Irritable bowel syndrome--the main recommendations.

J. Keller, P. Layer, J. Preiß, 2011, Deutsches Arzteblatt international.

Die chronische intestinale Pseudoobstruktion: Pathogenese, Diagnostik und Therapie

J. Keller, P. Layer, 2002 .

[Chronic intestinal pseudo-obstruction: pathogenesis, diagnosis and therapy].

J. Keller, P. Layer, 2002, Zeitschrift fur Gastroenterologie.

Ösophagusmotilitätsstörungen

J. Keller, U. Rosien, P. Layer, 2016, Gastroenterologie up2date.

A Modified 13C-Mixed Triglyceride Breath Test Detects Moderate Pancreatic Exocrine Insufficiency

J. Keller, P. Layer, C. Jahr, 2011, Pancreas.

Duodenal and ileal nutrient deliveries regulate human intestinal motor and pancreatic responses to a meal.

J. Keller, P. Layer, H. Goebell, 1997, The American journal of physiology.

The alternative serotonin transporter promoter P2 impacts gene function in females with irritable bowel syndrome

R. Spiller, W. Lieb, M. Gazouli, 2021, Journal of cellular and molecular medicine.

Tegaserod: Long-Term Treatment for Irritable Bowel Syndrome Patients with Constipation in Primary Care

J. Keller, P. Layer, S. Mueller-Lissner, 2005, Digestion.

The patient with slightly elevated pancreatic enzymes and abdominal complaints.

J. Keller, U. Rosien, P. Layer, 2007, Best practice & research. Clinical gastroenterology.

Chronic pancreatitis: faces, facets, and facts.

J. Keller, P. Layer, 2006, Swiss medical weekly.

Remote magnetic control of a wireless capsule endoscope in the esophagus is safe and feasible: results of a randomized, clinical trial in healthy volunteers.

Paul Swain, Frank Volke, P. Swain, 2010, Gastrointestinal endoscopy.

13C‐gastric emptying breath tests: Clinical use in adults and children

J. Keller, H. Hammer, B. Hauser, 2021, Neurogastroenterology and motility : the official journal of the European Gastrointestinal Motility Society.

[Motility disorders of the small intestine].

J. Keller, P. Layer, 2015, Der Internist.

Sensitivity and specificity of an abbreviated 13C-mixed triglyceride breath test for measurement of pancreatic exocrine function

J. Keller, U. Rosien, P. Layer, 2014, United European gastroenterology journal.

Akute Pankreatitis

J. Keller, P. Layer, S. Teising, 2013, Gastroenterologie up2date.

[Diagnosis of oesophageal reflux by PH, impedance, and bilirubin measurement: recommendations of the German Society of Neurogastroenterology and of the working group for neurogastroenterology of the German Society for Digestive and Metabolic Diseases].

H. Feußner, H. Mönnikes, I. R. van der Voort, 2012, Zeitschrift fur Gastroenterologie.

[Performance and interpretation of esophageal manometry: recommendations of the German Societies for Neurogastroenterology and Motility (DGNM), for Digestive and Metabolic Diseases (DGVS) and for General and Visceral Surgery (DGAV)].

M. Fox, I. R. van der Voort, J. Keller, 2009, Zeitschrift fur Gastroenterologie.

S3 Guideline of DGVS and DGNM "Definition, Pathophysiology, Diagnostic and Therapy of Intestinal Motility Disturbance"

J. Keller, P. Layer, J. Preiß, 2011 .

[S3 guideline of the German Society for Digestive and Metabolic Diseases (DGVS) and the German Society for Neurogastroenterology and Motility (DGNM) to the definition, pathophysiology, diagnosis and treatment of intestinal motility].

I. R. van der Voort, J. Keller, P. Layer, 2011, Zeitschrift fur Gastroenterologie.

CA72-4 may contribute to real-time reconnaissance of gastric cancer

J. Keller, Igor Ruvinsky, V. Andresen, 2012, F1000Research.

Akute Pankreatitis

J. Keller, P. Layer, S. Teising, 2013, Gastroenterologie up2date.

M. Camilleri, V. Montori, J. Keller, 2008, Clinical Gastroenterology and Hepatology.

Advances in the diagnosis and classification of gastric and intestinal motility disorders

M. Fox, P. Dinning, H. Parkman, 2018, Nature Reviews Gastroenterology & Hepatology.

Clinical measurement of gastrointestinal motility and function: who, when and which test?

M. Camilleri, M. Fox, S. Roman, 2018, Nature Reviews Gastroenterology & Hepatology.

Simultaneous non-invasive measurement of liquid gastric emptying and small bowel transit by combined 13C-acetate and H2-lactulose breath test

J. Keller, P. Layer, V. Andresen, 2014, Journal of breath research.

Interpretation und Durchführung der hochauflösenden Ösophagusmanometrie: Empfehlungen der Deutschen Gesellschaft für Neurogastroenterologie und Motilität (DGNM) sowie der Deutschen Gesellschaft für Gastroenterologie, Verdauungs- und Stoffwechselerkrankungen (DGVS)

M. Fox, I. R. van der Voort, J. Keller, 2018, Zeitschrift für Gastroenterologie.