This book for emergency physicians and fellows training in emergency medicine provides evidence-based information on what diagnostic tests to ask for and when and how to use particular decision rules. The new edition builds on the success of the current book by modifying the presentation of the evidence, increasing the coverage, and updating the current information throughout.About the Author: Jesse M. Pines, MD, MBA; Director, Center for Health Care Quality, Associate Professor Emergency Medicine and Health Policy, George Washington University, Washington, D.C., USA