1. Omaha Veterans Affairs Medical Center Omaha Nebraska USA
2. Division of Endocrinology University of Nebraska Medical Center Omaha Nebraska USA
3. Department of Biostatistics & Data Science University of Kansas Medical Center Kansas City Kansas USA
4. Department of Biostatistics University of Kansas Medical Center Kansas City Kansas USA
5. Department of Population Health University of Kansas Medical Center Kansas City Kansas USA
6. Center for Clinical Epidemiology & Population Health Marshfield Clinic Research Institute Marshfield Wisconsin USA