Dr. Grant (emeritus, medicine, U. of Ottawa), a gastroenterologist who has written several books on his specialty, dispels myths about the placebo effect. He discusses how control treatments and beliefs play a positive role in clinical trials, the doctor-patient relationship, evidence-based healthcare policy, and in the healing effect of time. The glossary includes the term "nocebo," placebo's opposite. Annotation ©2005 Book News, Inc., Portland, OR (booknews.com)