Since 1899, healthcare professionals around the world have put their trust in "The Merck Manual" more than in any other medical reference. Merck's ... Show synopsis Since 1899, healthcare professionals around the world have put their trust in "The Merck Manual" more than in any other medical reference. Merck's century-long commitment to supplying medical information continues with The Centennial (17th) Edition of this perennial favorite, which keeps medical professionals up to date on the latest important medical advances and features more changes than any other edition in the past 20 years. In addition, the 17th Edition is: Written by more than 300 medical experts in all fields of medicine from the United States, Canada, and around the worldRedesigned to enhance readability and make information easier to findExtensively revised to reflect the ever-increasing and changing body of medical knowledgeUpdated to include new topics, such as Smoking Cessation, Gulf-War Syndrome, Chronic Fatigue Syndrome, Multiple Chemical Sensitivity Syndrome, Rehabilitation, and Drug Therapy in the ElderlyAlso new: Tables and figures reformatted and redrawn; SI (System International) units added; in-depth discussions of symptoms, signs, and examination; As always, "The Merck Manual" is published as a not-for-profit service to the medical community. To honor the first 100 years of "The Merck Manual," copies purchased during the 1999 centennial year will be specially packaged with a reproduction of the 1899 Edition.