[1] Univ Michigan, Hematol Oncol, Ann Arbor, MI 48109 USA
[2] Duke Univ, Med Ctr, Dept OB GYN, Durham, NC USA
[3] Univ Pittsburgh, Dept Med, Div Hematol Oncol, Pittsburgh, PA USA
[4] Hemophilia Ctr Western Penn, Pittsburgh, PA USA
[5] Indiana Hemophilia & Thrombosis Ctr, Indianapolis, IN USA
[6] Childrens Hosp Philadelphia, Hematol, Philadelphia, PA 19104 USA
[7] Univ Penn, Philadelphia, PA 19104 USA
[8] Bloodworks Northwest, Seattle, WA USA
[9] Univ Washington, Dept Med, Div Hematol, Seattle, WA 98195 USA