1. Division of Cardiovascular Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
2. Thrombosis and Haemostasis Unit, Fondazione I.R.C.C.S. “Casa Sollievo della Sofferenza,” S. Giovanni Rotondo, Foggia, Italy
3. Department of Obstetrics and Gynecology, I.M. Sechenov First Moscow State Medical University, Moscow, Russia