1. Effects of age on tests of intestinal and hepatic function in normal healthy elderly humans;Arora;Gastroenterology,1989
2. Intestinal cholecalciferol absorption in the elderly and in younger adults;Barragry;Clin. Sci. Mol. Med.,1978
3. Folate synthesized by bacteria in the human upper small intestine is assimilated by the host;Camilo;Gastroenterology,1996
4. Iron absorption and gastric operations;Choudhurry;Clin. Sci.,1959
5. Evidence of an age-related decrease in intestinal responsiveness to vitamin D: relationship between serum 1,26 dihydroxyvitamin D3 and intestinal vitamin D receptor concentrations in normal women;Ebeling;J. Clin. Endocrinol. Metab.,1992