1. Prevention and Control of Infection Administration , King Saud Medical City, , P.O. Box 2897, Riyadh 11196 , Saudi Arabia
2. Ministry of Health , King Saud Medical City, , P.O. Box 2897, Riyadh 11196 , Saudi Arabia
3. Community Medicine Research Department, National Research Center , 33 El Buhouth Street 12622, Cairo , Egypt
4. Research and Innovation Center , King Saud Medical City, P.O. Box 2897, Riyadh 11196, Ministry of Health & College of Medicine, , P.O. Box 50927 Riyadh 11533 , Saudi Arabia
5. Al Faisal University , King Saud Medical City, P.O. Box 2897, Riyadh 11196, Ministry of Health & College of Medicine, , P.O. Box 50927 Riyadh 11533 , Saudi Arabia
6. Hubert Department of Global Health , Rollins School of Public Health, , 1518 Clifton Rd, 30322, Atlanta, GA , USA
7. Emory University , Rollins School of Public Health, , 1518 Clifton Rd, 30322, Atlanta, GA , USA
8. Division of Infectious Diseases, Kyung Hee University , Seoul 446-701 , Korea