Vitamin D, the parathyroid and the kidney.
D000293:Adolescent; D000818:Animals; D002648:Child; D002675:Child, Preschool; D049673:History, 20th Century; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007668:Kidney / Q000502:physiology*; D010281:Parathyroid Hormone / Q000266:history / Q000502:physiology*; D051381:Rats; D012279:Rickets / Q000188:drug therapy / Q000266:history; D014807:Vitamin D / Q000266:history / Q000378:metabolism / Q000502:physiology* / Q000627:therapeutic use
D010281:Parathyroid Hormone; D014807:Vitamin D