1. Department of Infection Prevention and Control, King Abdulaziz Medical City, Riyadh, Saudi Arabia
2. Department of Community Medicine, Faculty of Medicine, Mansoura University, Mansoura, Egypt
3. King Saud Bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
4. King Abdulla International Medical Research Center, King Saud University for Health Sciences, Riyadh, Saudi Arabia