Affiliation: | 1. Group Health Center for Health Studies, 1730 Minor Ave, Ste 1600, Seattle, WA 98101, United States;2. Epidemiology Research Center, Marshfield Clinic Research Foundation, Marshfield, WI, United States;3. Kaiser Permanente Institute for Health Research, Denver, CO, United States;4. Denver Health Community Health Services, Denver, CO, United States;5. Department of Biostatistics, University of Washington, Seattle, WA, United States;6. Kaiser Permanente Vaccine Study Center, Oakland, CA, United States;g Kaiser Permanente Northwest, Portland, OR, United States;h HealthPartners, Minneapolis, MN, United States;i Centers for Disease Control and Prevention, Atlanta, GA, United States |