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The National Library of Medicine (NLM), on the campus of NIH in Bethesda, Maryland, is the world's largest medical library. It collects materials in all major areas of the health sciences and to a lesser degree in such areas as chemistry, physics, botany and zoology. The collections stand at 5 million items--books, journals, technical reports, manuscripts, microfilms, photographs and images. Housed within the Library is one of the world's finest medical history collections of old (pre-1914) and rare medical texts, manuscripts, and incunabula.

The leading source for trustworthy and timely health and medical news and information. Providing credible health information, supportive community, and educational services by blending award-winning expertise in content, community services, expert commentary, and medical review.

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The Obesity Society promotes research, education, and advocacy to better understand, prevent, and treat obesity and improve the lives of those affected.The Obesity Society is the leading scientific and professional society dedicated to the study of obesity. Since 1982, we have been committed to encouraging research on the causes and treatment of obesity, and to keeping the medical community and public informed of new advances.