1. Department of Obstetrics and Gynecology, University of Arkansas for Medical Sciences, Little Rock, AR, USA
2. Department of Obstetrics and Gynecology, Marshall Health, Huntington, WV
3. Department of Biostatistics, University of Arkansas for Medical Sciences, Little Rock, AR, USA
4. Department of Obstetrics and Gynecology, Louisiana State University Health, Shreveport, LA, USA
5. Department of Pathology, University of Arkansas for Medical Sciences, Little Rock, AR, USA