Ionized calcium versus total calcium.
D002118:Calcium / Q000097:blood*; D002413:Cations, Divalent; D006801:Humans; D011485:Protein Binding; D012709:Serum Albumin / Q000378:metabolism
D002413:Cations, Divalent; D012709:Serum Albumin; D002118:Calcium