| Alcoholic hepatitis | New England Journal of Medicine | 2009 | 644 |
| Vancomycin therapeutic guidelines: a summary of consensus recommendations from the infectious diseases Society of America, the American Society of Health-System Pharmacists, and the Society of Infectious Diseases Pharmacists | Clinical Infectious Diseases | 2009 | 566 |
| Ten putative contributors to the obesity epidemic | Critical Reviews in Food Science and Nutrition | 2009 | 461 |
| Narcolepsy is strongly associated with the T-cell receptor alpha locus | Nature Genetics | 2009 | 380 |
| The hallucinogen N,N-dimethyltryptamine (DMT) is an endogenous sigma-1 receptor regulator | Science | 2009 | 375 |
| Lineage-specific biology revealed by a finished genome assembly of the mouse | PLoS Biology | 2009 | 354 |
| Development of the GerdQ, a tool for the diagnosis and management of gastro-oesophageal reflux disease in primary care | Alimentary Pharmacology and Therapeutics | 2009 | 349 |
| Localization of inner hair cell mechanotransducer channels using high-speed calcium imaging | Nature Neuroscience | 2009 | 308 |
| Working conditions in primary care: physician reactions and care quality | Annals of Internal Medicine | 2009 | 284 |
| Discovering hematopoietic mechanisms through genome-wide analysis of GATA factor chromatin occupancy | Molecular Cell | 2009 | 276 |
| The aryl hydrocarbon receptor: a perspective on potential roles in the immune system | Immunology | 2009 | 275 |
| ASTS recommended practice guidelines for controlled donation after cardiac death organ procurement and transplantation | American Journal of Transplantation | 2009 | 267 |
| Gender, culture, and mathematics performance | Proceedings of the National Academy of Sciences of the United States of America | 2009 | 262 |
| The Wisconsin Epidemiologic Study of Diabetic Retinopathy XXIII: the twenty-five-year incidence of macular edema in persons with type 1 diabetes | Ophthalmology | 2009 | 261 |
| At the crossroads of bacterial metabolism and virulence factor synthesis in Staphylococci | Microbiology and Molecular Biology Reviews | 2009 | 253 |
| The role of Src in solid tumors | Oncologist | 2009 | 252 |
| Nuclear EGFR contributes to acquired resistance to cetuximab | Oncogene | 2009 | 246 |
| Sequential therapy or triple therapy for Helicobacter pylori infection: systematic review and meta-analysis of randomized controlled trials in adults and children | American Journal of Gastroenterology | 2009 | 211 |
| Therapeutic monitoring of vancomycin in adults summary of consensus recommendations from the American Society of Health-System Pharmacists, the Infectious Diseases Society of America, and the Society of Infectious Diseases Pharmacists | Pharmacotherapy | 2009 | 207 |
| The savant syndrome: an extraordinary condition. A synopsis: past, present, future | Philosophical Transactions of the Royal Society B: Biological Sciences | 2009 | 197 |
| A randomized placebo-controlled clinical trial of 5 smoking cessation pharmacotherapies | Archives of General Psychiatry | 2009 | 190 |
| Recognition of lyso-phospholipids by human natural killer T lymphocytes | PLoS Biology | 2009 | 189 |
| The ACR BI-RADS experience: learning from history | Journal of the American College of Radiology | 2009 | 188 |
| Human embryonic stem cell phosphoproteome revealed by electron transfer dissociation tandem mass spectrometry | Proceedings of the National Academy of Sciences of the United States of America | 2009 | 175 |
| Background fluctuation of kidney function versus contrast-induced nephrotoxicity | American Journal of Roentgenology | 2009 | 163 |
