[1] Univ London Imperial Coll Sci Technol & Med, Dept Haematol, Hammersmith Hosp, London W12 0NN, England
[2] Glasgow Royal Infirm, Glasgow G4 0SF, Lanark, Scotland
[3] Univ Childrens Hosp, Ctr Thrombosis & Hemostasis, Brno, Czech Republic
[4] Rigshosp, DK-2100 Copenhagen, Denmark
[5] Univ Hosp, Krakow, Poland
[6] MC JU, Dept Surg 3, Krakow, Poland
[7] Med Univ Warsaw, Warsaw, Poland
[8] Pomeranian Med Univ, Clin Hosp No 2, Szczecin, Poland
[9] Kings Coll Hosp London, London, England
[10] Clin Hosp, Med Ctr Postgrad Educ, Warsaw, Poland