title: [Introduction].
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000375:Aging / Q000502:physiology*; D002908:Chronic Disease; D006233:Persons with Disabilities; D005060:Europe; D016330:Frail Elderly; D005602:France; D030342:Genetic Diseases, Inborn / Q000517:prevention & control; D006293:Health Promotion; D006801:Humans; D057187:Independent Living; D009369:Neoplasms / Q000517:prevention & control; D004856:Postural Balance