1. Johns Hopkins University, Bloomberg School of Public Health, Baltimore, MD, USA,
2. Department of Emergency Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA,
3. Department of Epidemiology & Biostatistics, University of California, San Francisco, San Francisco, CA, USA,
4. Liberian Ministry of Health, Tubman Blvd, Monrovia, Liberia and
5. Department of Biology and Emerging Pathogens Institute, University of Florida, FL, USA