Corey Casper1, Christina Fitzmaurice2. 1. Vaccine and Infectious Disease Division, Clinical Research Division, and Public Health Science Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA; Department of Medicine, The University of Washington, Seattle, WA, USA; Department of Epidemiology, The University of Washington, Seattle, WA, USA; Department of Global Health, The University of Washington, Seattle, WA, USA. 2. Department of Medicine, The University of Washington, Seattle, WA, USA; Institute for Health Metrics and Evaluation, Seattle, WA 98121, USA. Electronic address: cf11@uw.edu.