Bohn R L, Schramm W, Bullinger M, van den Berg M, Blanchette V
Division of Pharmacoepidemiology and Pharmacoeconomics, Brigham and Women's Hospital and Harvard Medical School, USA.
Haemophilia. 2004 Mar;10 Suppl 1:2-8. doi: 10.1111/j.1355-0691.2004.00873.x.