Language of publication restrictions in systematic reviews gave different results depending on whether the intervention was conventional or complementary.

[1]  M. Renfrew,et al.  Support for breastfeeding mothers. , 2002, The Cochrane database of systematic reviews.

[2]  D. Moher,et al.  Systematic reviews involving complementary and alternative medicine interventions had higher quality of reporting than conventional medicine reviews. , 2005, Journal of clinical epidemiology.

[3]  Harri Hemilä,et al.  Vitamin C for Preventing and Treating the Common Cold , 2005, PLoS medicine.

[4]  David Moher,et al.  Should meta-analysts search Embase in addition to Medline? , 2003, Journal of clinical epidemiology.

[5]  T P Klassen,et al.  The inclusion of reports of randomised trials published in languages other than English in systematic reviews. , 2003, Health technology assessment.

[6]  J. Sterne,et al.  How important are comprehensive literature searches and the assessment of trial quality in systematic reviews? Empirical study. , 2003, Health technology assessment.

[7]  Douglas G Altman,et al.  Statistical methods for assessing the influence of study characteristics on treatment effects in ‘meta‐epidemiological’ research , 2002, Statistics in medicine.

[8]  S. Thompson,et al.  Quantifying heterogeneity in a meta‐analysis , 2002, Statistics in medicine.

[9]  S. Thompson,et al.  How should meta‐regression analyses be undertaken and interpreted? , 2002, Statistics in medicine.

[10]  D. Moher,et al.  Assessing the quality of reports of systematic reviews in pediatric complementary and alternative medicine , 2002, BMC pediatrics.

[11]  Peter Jüni,et al.  Direction and impact of language bias in meta-analyses of controlled trials: empirical study. , 2002, International journal of epidemiology.

[12]  Douglas G. Altman,et al.  Systematic reviews in health care : meta-analysis in context , 2008 .

[13]  S D Walter,et al.  A comparison of methods to detect publication bias in meta‐analysis , 2001, Statistics in medicine.

[14]  A. Weil,et al.  Integrated medicine , 2001, BMJ : British Medical Journal.

[15]  Integrated medicine: orthodox meets alternative , 2001, BMJ : British Medical Journal.

[16]  Hofmeyr Gj.  External cephalic version facilitation for breech presentation at term. , 2001 .

[17]  G. Hofmeyr,et al.  Cephalic version by postural management for breech presentation. , 2012, The Cochrane database of systematic reviews.

[18]  S. Bell-Syer,et al.  Topical treatments for fungal infections of the skin and nails of the foot. , 2007, The Cochrane database of systematic reviews.

[19]  E. Ernst,et al.  Acupuncture for smoking cessation. , 2002, The Cochrane database of systematic reviews.

[20]  A R Jadad,et al.  What contributions do languages other than English make on the results of meta-analyses? , 2000, Journal of clinical epidemiology.

[21]  E Ernst,et al.  Location bias in controlled clinical trials of complementary/alternative therapies. , 2000, Journal of clinical epidemiology.

[22]  C. Siristatidis,et al.  Gonadotrophin‐releasing hormone agonist protocols for pituitary desensitization in in vitro fertilization and gamete intrafallopian transfer cycles , 2000 .

[23]  R. Lilford,et al.  Bromocriptine for idiopathic oligo/asthenospermia. , 1996, The Cochrane database of systematic reviews.

[24]  R. Lilford,et al.  Androgens versus placebo or no treatment for idiopathic oligo/asthenospermia. , 1996, The Cochrane database of systematic reviews.

[25]  R. Sterzi,et al.  Glycerol for acute stroke. , 2000, The Cochrane database of systematic reviews.

[26]  E. Figueredo,et al.  Prophylactic ondansetron for postoperative emesis.Meta‐analysis of its effectiveness in patients with previous history of postoperative nausea and vomiting , 1999, Acta anaesthesiologica Scandinavica.

[27]  T. Ferris,et al.  Holistic pediatrics: a research agenda. , 1999, Pediatrics.

[28]  D. Cook,et al.  Assessing the quality of reports of randomised trials: implications for the conduct of meta-analyses. , 1999, Health technology assessment.

[29]  T. Wilt,et al.  Saw palmetto extracts for treatment of benign prostatic hyperplasia: a systematic review. , 1998, JAMA.

[30]  C H Schmid,et al.  An empirical study of the effect of the control rate as a predictor of treatment efficacy in meta-analysis of clinical trials. , 1998, Statistics in medicine.

[31]  E. Ernst,et al.  Peppermint oil for irritable bowel syndrome: a critical review and metaanalysis , 1998, American Journal of Gastroenterology.

[32]  A. Vickers,et al.  Do certain countries produce only positive results? A systematic review of controlled trials. , 1998, Controlled clinical trials.

[33]  George Davey Smith,et al.  meta-analysis bias in location and selection of studies , 1998 .

[34]  Wayne B Jonas,et al.  Are the clinical effects of homoeopathy placebo effects? A meta-analysis of placebo-controlled trials , 1997, The Lancet.

[35]  C. Lengeler,et al.  Language bias in randomised controlled trials published in English and German , 1997, The Lancet.

[36]  M. Tramèr,et al.  Transcutaneous electrical nerve stimulation in labour pain: a systematic review , 1997, British journal of obstetrics and gynaecology.

[37]  C. Mulrow,et al.  St John's wort for depression—an overview and meta-analysis of randomised clinical trials , 1996, BMJ.

[38]  D. Moher,et al.  Completeness of reporting of trials published in languages other than English: implications for conduct and reporting of systematic reviews , 1996, The Lancet.

[39]  M. Buyse,et al.  Effects of dipyridamole in combination with anticoagulant therapy on survival and thromboembolic events in patients with prosthetic heart valves. A meta-analysis of the randomized trials. , 1995, The Journal of thoracic and cardiovascular surgery.

[40]  G. Trovato,et al.  Interferon-α Treatment in Patients with Chronic Hepatitis C , 1995 .

[41]  F. Pace,et al.  Meta-analysis of the effect of placebo on the outcome of medically treated reflux esophagitis. , 1995, Scandinavian journal of gastroenterology.

[42]  S. Kasper,et al.  Comparison of compliance between serotonin reuptake inhibitors and tricyclic antidepressants: a meta‐analysis , 1995, International clinical psychopharmacology.

[43]  G. Grégoire,et al.  Selecting the language of the publications included in a meta-analysis: is there a Tower of Babel bias? , 1995, Journal of clinical epidemiology.

[44]  A. Detsky,et al.  Efficacy of pneumococcal vaccination in adults. A meta-analysis of randomized controlled trials. , 1994, Archives of internal medicine.

[45]  S. Halpern,et al.  Postdural Puncture Headache and Spinal Needle Design: Metaanalyses , 1994, Anesthesiology.

[46]  S G Thompson,et al.  Systematic Review: Why sources of heterogeneity in meta-analysis should be investigated , 1994, BMJ.

[47]  F. Invernizzi,et al.  Chemotherapy vs supportive care in advanced non-small-cell lung cancer. Results of a meta-analysis of the literature. , 1994, Chest.

[48]  J D Emerson,et al.  Combining estimates of the odds ratio: the state of the art , 1994, Statistical methods in medical research.

[49]  G. Simonneau,et al.  Comparison of efficacy and safety of low molecular weight heparins and unfractionated heparin in initial treatment of deep venous thrombosis: a meta-analysis , 1994, BMJ.

[50]  G. M. Bressa,et al.  S‐adenosyl‐l‐methionine (SAMe) as antidepressant: meta‐analysis of clinical studies , 1994, Acta neurologica Scandinavica. Supplementum.

[51]  R Jaeschke,et al.  Selective Decontamination of the Digestive Tract: An Overview , 1994 .

[52]  F. Smaill,et al.  Use of immune globulin to prevent symptomatic cytomegalovirus disease in transplant recipients--a meta-analysis. , 1994, Clinical transplantation.

[53]  D. Mant,et al.  The effectiveness of nicotine replacement therapies in smoking cessation. , 1994 .

[54]  K. Brown,et al.  Use of nonhuman milks in the dietary management of young children with acute diarrhea: a meta-analysis of clinical trials. , 1994, Pediatrics.

[55]  T. Poynard,et al.  Meta-analysis of hydroxyethylrutosides in the treatment of chronic venous insufficiency. , 1994, VASA. Zeitschrift fur Gefasskrankheiten.

[56]  A. Wilson,et al.  A meta-analysis of the use of amoxycillin-clavulanic acid in surgical prophylaxis. , 1992, The Journal of hospital infection.

[57]  J. Boissel,et al.  Low molecular weight heparin in prevention of perioperative thrombosis. , 1992, BMJ.

[58]  G. Breart,et al.  Home visits for pregnancy complications and management of antenatal care: an overview of three randomized controlled trials , 1992, British journal of obstetrics and gynaecology.

[59]  J Van Ruiswyk,et al.  Efficacy of prophylactic sclerotherapy for prevention of a first variceal hemorrhage. , 1992, Gastroenterology.

[60]  A. Glassman,et al.  A meta-analysis of double-blind placebo-controlled trials of clonidine for smoking cessation. , 1991, British journal of addiction.

[61]  P. Schmitz,et al.  Meta‐analysis of randomized, controlled clinical trials of antibiotic prophylaxis in biliary tract surgery , 1990, The British journal of surgery.

[62]  J. Boissel,et al.  Is It Possible to Reduce the Risk of Cardiovascular Events in Subjects Suffering from Intermittent Claudication of the Lower Limbs? , 1989, Thrombosis and Haemostasis.

[63]  T C Chalmers,et al.  Meta-analysis of clinical trials as a scientific discipline. II: Replicate variability and comparison of studies that agree and disagree. , 1987, Statistics in medicine.

[64]  T C Chalmers,et al.  Meta-analysis of clinical trials as a scientific discipline. I: Control of bias and comparison with large co-operative trials. , 1987, Statistics in medicine.

[65]  S Greenland,et al.  A general estimator for the variance of the Mantel-Haenszel odds ratio. , 1986, American journal of epidemiology.

[66]  N. Laird,et al.  Meta-analysis in clinical trials. , 1986, Controlled clinical trials.

[67]  L. Hedges,et al.  Statistical Methods for Meta-Analysis , 1987 .

[68]  H. Silberman,et al.  Comparison of two long-term chemotherapy regimens, with or without agents to modify skeletal repair, in multiple myeloma , 1984 .