1. Research Unit Department of Medical Education College of Medicine King Saud bin Abdulaziz University for Health Sciences Riyadh Saudi Arabia
2. King Abdullah International Medical Research Center Riyadh Saudi Arabia
3. College of Medicine King Saud bin Abdulaziz University for Health Sciences Riyadh Saudi Arabia
4. Department of Medicine Khyber Teaching HospitalMTI Peshawar Pakistan
5. Department of Medicine Lady Reading HospitalMTI Peshawar Pakistan