Sah, N. P.; Gupta, R. K.; Awale, L.; Deo, K. B.; Sah, R. P.; Kumar, A.; Sah, S. P. Operative Difficulty Grading Scale for Laparoscopic Cholecystectomy at a Tertiary Care Hospital in Eastern Nepal. J. Kathmandu Med. Coll. 2022, 11, 58-67.