1. School of Interdisciplinary Arts and Sciences, University of Washington, Bothell, WA 98011, USA
2. School of Nursing and Health Studies, University of Washington, Bothell, WA 98011, USA
3. Department of Preventive Medicine and Population Health, School of Medicine, University of Texas at Tyler, Tyler, TX 75708, USA
4. Department of Internal Medicine, Division of Infectious Diseases, The University of Texas Southwestern Medical Center, Dallas, TX 75390, USA