1. Department of Obstetrics and Gynecology, University of Colorado School of Medicine, Aurora, CO, USA
2. Department of Surgery, University of Colorado School of Medicine, Aurora, CO, USA
3. Department of General Surgery, University of Colorado School of Medicine and Denver Health Medical Center, Denver, CO, USA
4. Department of Obstetrics and Gynecology, University of Colorado School of Medicine and Denver Health Medical Center, Denver, CO, USA