title: Comparative biological effects of vitamins D 2  and D 3  and dihydrotachysterol 2  and dihydrotachysterol 3  in the chick.
mesh_terms: D000284:Administration, Oral; D000818:Animals; D001862:Bone Resorption / Q000187:drug effects; D001842:Bone and Bones / Q000032:analysis; D002118:Calcium / Q000097:blood / Q000378:metabolism; D002136:Calcium, Dietary; D002645:Chickens / Q000254:growth & development; D002762:Cholecalciferol / Q000008:administration & dosage / Q000494:pharmacology*; D004032:Diet; D004097:Dihydrotachysterol / Q000008:administration & dosage / Q000494:pharmacology*; D004872:Ergocalciferols / Q000008:administration & dosage / Q000494:pharmacology*; D007408:Intestinal Absorption / Q000187:drug effects; D008297:Male; D012279:Rickets / Q000188:drug therapy*; D013997:Time Factors; D014808:Vitamin D Deficiency / Q000188:drug therapy
chemical_list: D002136:Calcium, Dietary; D004872:Ergocalciferols; D002762:Cholecalciferol; D004097:Dihydrotachysterol; D002118:Calcium