1. Department of Obstetrics and Gynecology, University of Colorado School of Medicine , Aurora, CO 80045 , USA
2. Department of Medicine, Rocky Mountain Regional VA Medical Center , Aurora, CO 80045 , USA
3. Division of Endocrinology, Metabolism, and Diabetes, University of Colorado School of Medicine , Aurora, CO 80045 , USA
4. Department of Biostatistics and Informatics, Colorado School of Public Health , Aurora, CO 80045 , USA
5. Department of Biochemistry and Molecular Genetics, University of Colorado School of Medicine , Aurora, CO 80045 , USA