1 Department of Global Health and Department of Medicine, Division of Allergy and Infectious Diseases, University of Washington, Seattle, WA 98104, USA; Fred Hutchinson Cancer Research Center, Seattle, WA, USA. Electronic address: aeshapir@uw.edu.
2 Department of Global Health and Department of Medicine, Division of Allergy and Infectious Diseases, University of Washington, Seattle, WA 98104, USA; Fred Hutchinson Cancer Research Center, Seattle, WA, USA.