Calcium absorption in the elderly.
D000328:Adult; D000368:Aged; D000375:Aging; D000818:Animals; D002118:Calcium / Q000378:metabolism*; D004351:Drug Resistance; D004872:Ergocalciferols / Q000627:therapeutic use; D005260:Female; D006801:Humans; D007408:Intestinal Absorption; D008286:Malabsorption Syndromes / Q000188:drug therapy; D008297:Male; D008875:Middle Aged; D008954:Models, Biological; D010024:Osteoporosis / Q000209:etiology; D051381:Rats; D014807:Vitamin D / Q000378:metabolism
D004872:Ergocalciferols; D014807:Vitamin D; D002118:Calcium