[1] Univ Arkansas Med Sci, Little Rock, AR 72205 USA
[2] Arkansas Childrens Hosp, 800 Marshall St, Little Rock, AR 72202 USA
[3] Ctr Dis Control & Prevent, Atlanta, GA USA
[4] Case Western Reserve Univ, Cleveland, OH 44106 USA
[5] Univ Colorado, Hemophilia & Thrombosis Ctr, Anschutz Med Campus, Aurora, CO USA
[6] Michigan State Univ, Dept Pediat, Ctr Bleeding & Clotting Disorders, Lansing, MI USA
[7] Cohen Childrens Med Ctr, Northwell Hemostasis & Thrombosis Ctr, New Hyde Pk, NY USA
[8] Childrens Hosp Michigan, Div Hematol Oncol, Detroit, MI 48201 USA
[9] Univ Calif San Francisco, San Francisco, CA 94143 USA
[10] Univ Iowa Hlth Care, Carver Coll Med, Stead Family Dept Pediat, Iowa City, IA USA