1. Department of Population and Public Health Sciences Keck School of Medicine University of Southern California Los Angeles CA USA
2. Department of Geography College of Geosciences Texas A&M University College Station TX USA
3. Department of Computer Science and Engineering College of Geosciences Texas A&M University College Station TX USA
4. Spatial Sciences Institute University of Southern California Los Angeles CA USA
5. Department of Epidemiology and Environmental Sciences Fielding School of Public Health University of California Los Angeles CA USA
6. Los Angeles County Department of Public Health Los Angeles CA USA