1. Epidemiology and statistical characteristics of the United States elderly population;Brody,1985
2. Gastrointestinal and liver function in old age;James;Clin Gastroenterol,1983
3. The aging gut: a study of intestinal absorption in relation to nutrition in the elderly;Montgomery;Q J Med,1978
4. Steatorrhea in the elderly;Price;Br Med J,1977
5. Intestinal absorption studies in the aged;Pelz;Geriatrics,1968