Acute Disease Cholangiography Cholecystectomy Cholecystectomy, Laparoscopic--adverse effects Cholecystitis--surgery Common Bile Duct--injuries Faculty, Medical Female General Surgery--education Humans Internship and Residency Intraoperative Care Learning Length of Stay Male Middle Aged Pancreatitis--etiology Postoperative Care Postoperative Hemorrhage--etiology Time Factors Treatment Outcome