Edited by Nicholas J. Talley, MD, PhD, MMSc(Clin Epi), FRACP, FRCP(London), FRCP(Edin), FAFPHM, FACP, FACG, Professor of Medicine, Mayo Clinic College of Medicine; Chair, Department of Internal Medicine, Mayo Clinic Jacksonville, Florida; Consultant Physician; Martin D. Weltman, MBBCh, PhD, FRACP, FAChAM, Associate Professor of Medicine University of Sydney; Senior Staff Specialist Gastroenterologist and Head of Department of Gastroenterology and Hepatology, Nepean Hospital, NSW, Australia; Clinical Director Drug and Alcohol Services, Sydney West Area Health Service; and Isidore Segal, MBBCh, PhD, FRACP, FRCP(London), Emeritus Professor (University of Witwatersrand, Johannesburg), Gastroenterology Unit, Prince of Wales Hospital , Sydney |