1. Department of Civil and Environmental Engineering, Stanford University, 473 Via Ortega, Stanford, California 94305, United States
2. Division of Infectious Diseases and Geographic Medicine, Department of Medicine, Stanford University, 300 Pasteur Drive, Stanford, California 94305, United States
3. Department of Epidemiology and Population Health, Stanford University, 300 Pasteur Drive, Stanford, California 94305, United States
4. Gangarosa Department of Environmental Health, Rollins School of Public Health, Emory University, 1518 Clifton Rd, Atlanta, Georgia 30322, United States