Robert Sidonio1, Shannon Meeks1, Amy Shapiro2, Marilyn Manco-Johnson3 and Michael Callaghan4

1Emory University, Atlanta, GA USA and Children’s Healthcare of Atlanta, Atlanta, GA, USA; 2Indiana Hemophilia & Thrombosis Center, Indianapolis, IN, USA; 3Hemophilia and Thrombosis Center, University of Colorado, Denver, CO, USA; 4Children’s Hospital of Michigan, Detroit, MI, USA