1. Weill Cornell Medical College; New York NY USA
2. American Thrombosis and Hemostasis Network; Riverwoods IL USA
3. Children's Mercy Hospital; Kansas City MO USA
4. Emory University/Children's Healthcare of Atlanta Comprehensive Bleeding Disorder Clinic; Atlanta GA USA
5. Center for Comprehensive Care and Diagnosis of Inherited Blood Disorders; Orange CA USA
6. Bleeding and Clotting Disorders Institute; University of Illinois College of Medicine-Peoria; Peoria IL USA
7. Vanderbilt University Medical Center; Nashville TN USA
8. Nationwide Children's Hospital/Ohio State University; Columbus OH USA