1 Infectious Disease Unit, Specialty Internal Medicine, Johns Hopkins Aramco Healthcare, Dhahran, Saudi Arabia.
2 Department of Medicine, Indiana University School of Medicine, Indianapolis, IN, USA.
3 Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
4 Center for Biomedicine and Community Health, International School, Vietnam National University, Hanoi, Vietnam.
5 Thai Binh University of Medicine and Pharmacy, Thai Binh, Vietnam.
6 Director Research and Innovation Centre, King Saud Medical City, Ministry of Health and College of Medicine, Alfaisal University, Riyadh, Kingdom of Saudi Arabia. zmemish@yahoo.com.
7 Hubert Department of Global Health, Rollins School of Public Health, Emory University, Atlanta, GA, USA. zmemish@yahoo.com.