Originally created for physicians and other healthcare providers, this Sourcebook has been revised and updated for non-professionals wishing to pursue self-directed research. To make advanced sources more accessible to a general audience, each chapter provides background information, glossaries, specific references and directory information. The title of this book includes the word "official." This relects the fact that the sourcebook directs you to advanced public, adademic, government, and peer-reviewed research. Selected readings from various research agencies are reproduced to give your some of the latest official information available.