title: Formation and dissolution of gallstones.
mesh_terms: D000368:Aged; D001646:Bile / Q000378:metabolism; D002635:Chenodeoxycholic Acid / Q000627:therapeutic use; D002769:Cholelithiasis / Q000188:drug therapy / Q000209:etiology*; D002784:Cholesterol / Q000378:metabolism; D002793:Cholic Acids / Q000378:metabolism; D005260:Female; D006801:Humans; D008875:Middle Aged; D010713:Phosphatidylcholines / Q000378:metabolism
chemical_list: D002793:Cholic Acids; D010713:Phosphatidylcholines; D002635:Chenodeoxycholic Acid; D002784:Cholesterol