1. Avera Research Institute , Sioux Falls, SD 57108 , USA
2. Department of Pediatrics, University of South Dakota School of Medicine , Sioux Falls, SD 57105 , USA
3. Lifecourse Epidemiology of Adiposity and Diabetes (LEAD) Center, University of Colorado Anschutz Medical Campus , Aurora, CO 80045 , USA
4. Department of Epidemiology, Colorado School of Public Health , Aurora, CO 80045 , USA
5. Department of Pediatrics, University of Colorado School of Medicine , Aurora, CO 80045 , USA