1. National Rehabilitation Centre, Abu Dhabi, United Arab Emirates
2. Division of Academic Psychiatry, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, UK
3. Institute of Psychiatry, Ain Shams University, Cairo, Egypt
4. Faculty of Medicine, Cairo University, Cairo, Egypt
5. Faculty of Medicine, Assuit University, Asyut, Egypt
6. Academy of Clinical Sciences and Laboratory Medicine, Dublin, Ireland
7. Medical Statistics Team, University of Aberdeen, Aberdeen, UK