While doctors through the ages have thought that they had based their practice on evidence, a new movement based on the ideas of the Scottish doctor Archie Cochrane has shown that this might not be the case. The core of evidence-based medicine is the formulation of a question relevant to a clinical problem, then researching around this problem selecting the best type evidence from explicit criteria, and finally the making of decisions based on patients' values. This approach has received a mixed response in the medical community. This book focuses on its limitation as well as its strengths. With contributions from recognized experts across many disciplines, this volume will prove to be of great interest to medical professionals, health planners and health science students across the world.