1 Leuven, Belgium; University of Oxford, Oxford, United Kingdom; University Cattolica, Rome, Italy; Moscow State Univeristy, Moscow, Russia; Gruppo Italo Belga, Rome, Italy.
2 Department of Biomedicine and Prevention, University of Tor Vergata, Rome, Italy.
3 Obstetrics and Gynecology, University of Tennessee Health Science Center, Memphis, Tennessee; Institutional Review Board, Virginia Commonwealth University, Richmond, Virginia.