Zahid Saeed, Muhammad Usman Aslam, Raza Akram, Azizullah Khan Sherani, Sheikh Qais, Muhammad Faheem Anwar (2023) “A Randomized Controlled Trial Comparing Three-Port and Four-Port Laparoscopic Cholecystectomy for Acute Cholecystitis”, Pakistan Journal of Medical & Health Sciences, 17(11), p. 444. doi: 10.53350/pjmhs20231711444.