Mannan AA, Soomro SA, Kumari A, Memon FAR. Umbilical bleeding during menstruation in status post laparoscopic cholecystectomy of unknown/ambiguous aetiology. Int Surg J [Internet]. 2022 May 26 [cited 2025 Apr. 28];9(6):1250-3. Available from: https://www.ijsurgery.com/index.php/isj/article/view/8838