1. Division of Global Public Health, Department of Preventive Medicine and Biostatistics, Uniformed Services University , 4301 Jones Bridge Road, Bethesda, MD 20814 , USA
2. MPH Program, Department of Preventive Medicine and Biostatistics, Uniformed Services University , 4301 Jones Bridge Road, Bethesda, MD 20814 , USA
3. Makerere University , Kampala , Uganda