1. Division of Maternal‐Fetal Medicine, Department of Obstetrics and GynecologySidney Kimmel Medical College of Thomas Jefferson UniversityPhiladelphia Pennsylvania USA
2. Atherosclerosis and Thrombosis Unit, Istituto di Ricovero e Cura a Carattere Scientifico Casa Sollievo Della SofferenzaSan Giovanni Rotondo (Foggia) Italy
3. Department of Obstetrics and GynecologyPennsylvania HospitalPhiladelphia Pennsylvania USA
4. Department of Maternal‐Fetal MedicineVirginia Hospital CenterArlington Virginia USA