1. Department of Obstetrics and Gynecology, University of Colorado School of Medicine, Aurora, CO, USA
2. Department of Obstetrics and Gynecology, University of California Los Angeles, Los Angeles, CA, USA
3. Department of Food Science and Human Nutrition, Colorado State University, Fort Collins, CO, USA
4. Department of Medicine, University of Colorado School of Medicine, Aurora, CO, USA
5. Center for Health and The Environment, University of California Davis, Davis, CA, USA