Ryan C Murphy1,2, Matthew C Altman3,4. 1. Division of Pulmonary, Critical Care, and Sleep Medicine, University of Washington, Seattle, WA, USA. 2. Center for Lung Biology, University of Washington, Seattle, WA, USA. 3. Division of Allergy and Infectious Disease, Department of Medicine, University of Washington, Seattle, WA, USA. maltman@benaroyaresearch.org. 4. Systems Immunology Division, Benaroya Research Institute, Seattle, WA, USA. maltman@benaroyaresearch.org.