title: [Investigation of the causes of urolithiasts. I. Calcium metabolism, with special reference to serum ionized calcium (author's transl)].
mesh_terms: D000328:Adult; D002118:Calcium / Q000097:blood*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D014545:Urinary Calculi / Q000209:etiology*
chemical_list: D002118:Calcium