The estimation of "free" calcium in the urine and its relevance to calculus formation.
D001826:Body Fluids; D002118:Calcium / Q000652:urine*; D006801:Humans; D012044:Regression Analysis; D016482:Urinalysis; D014545:Urinary Calculi / Q000209:etiology*
D002118:Calcium
CALCIUM/urine; URINARY CALCULI/etiology