title: [Current progress in the study of vitamin D--discovery of active vitamin D].
mesh_terms: D000818:Animals; D001842:Bone and Bones / Q000032:analysis; D002118:Calcium / Q000378:metabolism; D055598:Chemical Phenomena; D002621:Chemistry; D002845:Chromatography; D004386:Duodenum; D007413:Intestinal Mucosa / Q000032:analysis; D007421:Intestine, Small / Q000378:metabolism; D008099:Liver / Q000032:analysis; D051381:Rats; D012822:Silicon Dioxide; D013552:Swine; D013997:Time Factors; D014316:Tritium; D014807:Vitamin D / Q000378:metabolism*
chemical_list: D014316:Tritium; D014807:Vitamin D; D012822:Silicon Dioxide; D002118:Calcium