title: Does it matter who does ultrasound examination of the gall bladder?
mesh_terms: D002769:Cholelithiasis / Q000175:diagnosis* / Q000473:pathology; D003951:Diagnostic Errors; D005704:Gallbladder / Q000473:pathology*; D006801:Humans; D012189:Retrospective Studies; D014463:Ultrasonography