1. Indiana Hemophilia and Thrombosis Center; Indianapolis; IN; USA
2. Division of Blood Disorders; National Center on Birth Defects and Developmental Disabilities; Centers for Disease Control and Prevention; Atlanta; GA; USA
3. University of Colorado; Denver; CO; USA
4. Michigan State University; East Lansing; MI; USA
5. Intermountain Hemophilia and Thrombosis Center, Primary Children's Medical Center; Salt Lake City; UT; USA
6. Oregon Hemophilia Center, CDRC/Doernbecher Children's Hospital, Oregon Health & Science University; Portland; OR; USA
7. Medical College of Wisconsin and the Comprehensive Centre for Bleeding Disorders, Blood Center of Wisconsin; Milwaukee; WI; USA