title: Hydroxyapatite--the forgotten crystal in calcium urolithiasis.
mesh_terms: D002118:Calcium / Q000652:urine*; D003461:Crystallography; D006801:Humans; D006882:Hydroxyapatites / Q000652:urine*; D006961:Hyperparathyroidism / Q000652:urine; D010070:Oxalates / Q000652:urine; D014545:Urinary Calculi / Q000209:etiology / Q000652:urine*
chemical_list: D006882:Hydroxyapatites; D010070:Oxalates; D002118:Calcium