1. Department of Pediatrics, Section of Hematology/Oncology; Baylor College of Medicine; Houston TX USA
2. Division of Blood Disorders; National Center on Birth Defects and Developmental Disabilities; Centers for Disease Control and Prevention; Atlanta GA USA
3. Department of Obstetrics and Gynecology; Baylor College of Medicine; Houston TX USA
4. Division of Maternal-Fetal Medicine; Duke University; Durham NC USA
5. Mary M. Gooley Hemophilia Treatment Center; Rochester NY USA
6. Department of Pediatrics and Human Development; Michigan State University; East Lansing MI USA