1 Paediatric Hepatology Unit, Department of Paediatrics, Faculty of Medicine, Cairo University, Cairo, Egypt. Electronic address: melshabrawi@kasralainy.edu.eg.
2 Sir Syed College of Medical Sciences for Girls, Karachi, Pakistan.
3 Gastroenterology, Hepatology and Endemic Medicine Department, Faculty of Medicine, Beni-Suef University, Beni-Suef, Egypt.
4 Paediatric Hepatology Unit, Department of Paediatrics, Faculty of Medicine, Cairo University, Cairo, Egypt.