1. Department of Molecular and Integrative Physiology, University of Kansas Medical Center, Kansas City, KS 66160
2. Department of Biostatistics, University of Kansas Medical Center, Kansas City, KS 66160
3. Department of Obstetrics and Gynecology, University of Kansas Medical Center, Kansas City, KS 66160
4. Institute for Reproduction and Perinatal Research, Center for Reproductive Sciences, University of Kansas Medical Center, Kansas City, KS 66160