Book excerpt: Authoritative new text from the experts in GI populationstudies This book covers both key methodological issues and the mostimportant information in the field, disease by disease. It focuseson population-based information and studies looking at principlesand approaches to diagnosis and treatment of diseases. GI Epidemiology brings together world authorities inmultiple disciplines for the very first time, to create one clearand comprehensive source. The bulk of the chapters are divided intotwo parts, covering methodological issues and the epidemiology ofspecific GI diseases. Each chapter begins with a list of keypoints, followed by a review written in a clear and simplestyle. The methodologic chapters cover evidence-based medicine,meta-analysis, systematic reviews, genetic and molecularepidemiology, clinical trials, questionnaire design, and healtheconomics. The disease-specific chapters note the current gaps inknowledge and suggest areas for further study. GI Epidemiology serves as both a useful refresher and areliable reference on the methods and techniques used inepidemiological studies for consultants and researchers ingastroenterology. It is also an invaluable tool for fellows/trainees ingastroenterology, candidates for recertification in the combineddisciplines of gastroenterology, pediatric gastroenterology andcolorectal surgery, and anyone completing MPH training.