1. Department of Neurology and Psychiatry, Assiut University Hospital, Faculty of Medicine, Asyut, Egypt
2. Department of Neurology and Psychiatry, Aswan University Hospital, Faculty of Medicine, Aswan, Egypt
3. Department of Tropical Medicine and Gastroenterology, Faculty of Medicine, Assiut University, Asyut, Egypt
4. Department of Child & Adolescent Psychiatry, Institute of Psychiatry, Psychology & Neuroscience, King’s College London, London, UK