This encyclopedia advances the understanding of behavioral medicine principles and clinical applications among researchers and practitioners in medicine, psychology, public health, epidemiology, nursing, and social work. In addition, the encyclopedia provides useful synergies for sociologists, anthropologists, and undergraduates with some interest in the interface of human health and behavior. Areas covered include quality of life and lifespan issues; population, health policy, and advocacy issues; health promotion and disease prevention; behavioral care in all types of settings; biological, psychological, and person factors in health behavior change; professional development and practice-related issues; and  much more. This encyclopedia is the first resource to which readers turn for factual, relevant, and comprehensive information to aid in delivering the highest quality services.