title: A study on bilirubin in pigmented calcium stones.
mesh_terms: D001663:Bilirubin / Q000737:chemistry*; D002118:Calcium; D002769:Cholelithiasis / Q000737:chemistry*
chemical_list: D001663:Bilirubin; D002118:Calcium
keywords: BILIRUBIN/chemistry; CHOLELITHIASIS/chemistry