Reviewed by nearly 50 practicing physicians from a cross section of medical specialties, the book provides authoritative guidance on hundreds of diseases and disorders and all the latest tests, treatments, procedures, and drugs — from SARS and portable defibrillators to LASIK and morning-after pills — and provides new or greatly expanded coverage of genetic testing, sexual orientation, learning disabilities, ADD and ADHD, pregnancy, stem cell transplants, flu shots, and drug abuse.