1. Department of Obstetrics and Gynecology, Texas Tech University Health Sciences Center, El Paso, TX 79905, USA
2. Department of Obstetrics and Gynecology, The George Washington University School of Medicine and Health Sciences, Washington, DC 20037, USA
3. Department of Biomedical Sciences, Mercer University School of Medicine, Macon, GA 31207, USA
4. Masonic Cancer Center and Department of Obstetrics, Gynecology and Women’s Health, University of Minnesota, Minneapolis, MN 55455, USA
5. Department of Biomedical and Clinical Science, Linköping University, SE-581 85 Linköping, Sweden