Ali, Muhammad, Muhammad Ibrahim Shuja, Faiz Ur Rahman, Aamir Ali Khan, Muhammad Kashif, and Zia Ullah. 2022. “The Impact of Preoperative Physical and Respiratory Therapy on Postoperative Complications and Lung Function in Obese Patients Undergoing Laparoscopic Upper Abdominal Surgery”. Pakistan Journal of Chest Medicine 28 (1):87-94. http://pjcm.net/index.php/pjcm/article/view/835.