1 Olson Center for Women's Health, Department of Obstetrics and Gynecology, College of Medicine, University of Nebraska Medical Center, Omaha, NE, United States.
2 Department of Biology & Chemistry, School of Health Sciences, Liberty University, Lynchburg, VA, United States.
3 BMC Munich, Cell Biology, Anatomy III, Ludwig-Maximilians-University, Planegg, Germany.
4 Department of Animal and Rangeland Sciences, College of Agricultural Sciences, Oregon State University, Corvallis, OR, United States.