Features contributions from a diverse group of medical professionals-including psychologists, dermatologists, pulmonary and critical care specialists, gynaecologists, cardiologists, ophthalmologists, gastroenterologists, and many others. A wide range of topics are covered, from infancy to old age, paying attention to differences between genders and ethnic groups. Related body systems are grouped together in Volume 1 though Volume 3, with general health information in Volume 4. Each section is organized A to Z and provides and invaluable overview, discussing history, current research, and breakthoughs.