1. Department of Epidemiology, Human Genetics & Environmental Sciences, Center for Infectious Diseases, School of Public Health, University of Texas Health Science Center at Houston, Houston, TX 77030, USA
2. Department of Epidemiology and Biostatistics, College of Public Health, Kuwait University, Khaldiya 12037, Kuwait
3. Kuwait Institute of Scientific Research, Kuwait City 13109, Kuwait
4. Microbiology and Infectious Diseases Program, Graduate School of Biomedical Sciences, University of Texas MD Anderson Cancer Center UTHealth, Houston, TX 77030, USA