1 Infectious Disease Unit, Specialty Internal Medicine, Quality and Patient Safety Department, Johns Hopkins Aramco Healthcare, Dhahran, Saudi Arabia; Department of Medicine, Indiana University School of Medicine, Indianapolis, IN, USA; Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
2 College of Medicine, King Saud University, Riyadh, Saudi Arabia; Division of Infectious Diseases, Department of Internal Medicine, King Saud University Medical City, King Saud University, Riyadh, Saudi Arabia; Division of Infectious Diseases, Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada.
3 Director Research Center, King Saud Medical City, Ministry of Health, Saudi Arabia; Al-Faisal University, Riyadh, Saudi Arabia; Hubert Department of Global Health, Rollins School of Public Health, Emory University, Atlanta, GA, USA. Electronic address: zmemish@yahoo.com.