1. Center for Chronic Disease Outcomes Research, Minneapolis Veterans Affairs Healthcare System, Minneapolis, MN, USA;
2. Division of Health Policy and Management, University of Minnesota, School of Public Health, Minneapolis, MN, USA;
3. Department of Urology, University of Minnesota, Minneapolis, MN, USA;
4. Geriatric Research Education and Clinical Center, Minneapolis Veterans Affairs Healthcare System, Minneapolis, MN, USA;
5. Department of Medicine, University of Minnesota, Minneapolis, MN, USA