[1] Univ Minnesota, Med Ctr, Minneapolis, MN 55455 USA
[2] Univ Calif Davis, Sacramento, CA 95817 USA
[3] Maggiore Hosp Policlin, IRCCS Ca Granda Fdn, Angelo Bianchi Bonomi Hemophilia & Thrombosis Ctr, Milan, Italy
[4] Singapore Gen Hosp, Dept Haematol, Singapore, Singapore
[5] Bayer HealthCare Pharmaceut, Whippany, NJ USA
[6] Bayer Vital GmbH, Leverkusen, Germany
[7] Bayer Pharma AG, Berlin, Germany