1. Department of Family Medicine, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
2. Department of Emergency Medicine, University of Massachusetts Chan Medical School, Worcester, MA, USA
3. Department of Community and Behavioral Health, College of Public Health, University of Iowa, Iowa City, IA, USA
4. Oregon Health & Science University, Portland, OR, USA
5. University of California, San Francisco, San Francisco, CA, USA
6. Holden Comprehensive Cancer Center, University of Iowa, Iowa City, IA, USA
7. Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, IA, USA