Ramkumar Menon1, Scott M Williams2, Ronald F Lamont3. 1. Dept of Obstetrics and Gynecology, The University of Texas Medical Branch at Galveston, TX, USA. Electronic address: ram.menon@utmb.edu. 2. Department of Population and Quantitative Health Sciences, Case Western Reserve University, Cleveland, OH, USA. 3. Dept of Obstetrics and Gynecology, University of Southern Denmark, Odense, Denmark.