1. King Abdulaziz Medical City / King Saud bin Abdulaziz University for Health Sciences, Jeddah, Saudi Arabia.
2. King Abdullah International Medical Research Center / King Saud bin Abdulaziz University for Health Sciences, Jeddah, Saudi Arabia.
3. Aseer Central Hospital, Abha, Saudi Arabia.
4. King Khalid University, Abha, Saudi Arabia.