1. The Children's Hospital of Philadelphia Hemostasis and Thrombosis Center; Philadelphia PA USA
2. Center for Community Health and Evaluation; Seattle WA USA
3. National Hemophilia Program Coordinating Center; Riverwoods IL USA
4. University of Colorado Hemophilia and Thrombosis Center; Aurora CO USA
5. Maternal and Child Health Bureau; Health Resources and Services Administration; Rockville MD USA
6. Hemostasis and Thrombosis Center; Children's Hospital Los Angeles; University of Southern California Keck School of Medicine; Los Angeles CA USA
7. Rainbow Babies & Children's Hospital; Cleveland OH USA