Division of Infectious Diseases, Department of Medicine, King Edward Medical University, Nila Gumbad Chowk, Neela Gumbad, Lahore, Punjab 54000, Pakistan. Electronic address: huzaifacheema@kemu.edu.pk. Clinical Research Development Unit, Alborz University of Medical Sciences, Karaj, Iran; Student Research Committee, School of Medicine, Alborz University of Medical Sciences, Karaj, Iran. School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran. Division of Infectious Diseases, Department of Medicine, King Edward Medical University, Nila Gumbad Chowk, Neela Gumbad, Lahore, Punjab 54000, Pakistan. Department of Medicine, Ochsner Rush Medical Center, Meridian, MS, United States. Department of Gastroenterology, Hepatology & Nutrition, University of Texas MD Anderson Cancer Center, Houston, TX, United States. New York State Department of Health, Albany, NY, United States. Section of Gastroenterology and Hepatology, Department of Medicine, Baylor College of Medicine, Houston, TX, United States.