[1] Malmo Univ Hosp, Dept Paediat, SE-20502 Malmo, Sweden
[2] Univ Munich, Dr Von Haunerschen Kinderspital, D-80337 Munich, Germany
[3] Univ Utrecht Hosp, van Creveld Klin, NL-3508 GA Utrecht, Netherlands
[4] CHU Timone, Serv Hematol Pediat, F-13385 Marseille 05, France
[5] CHRU Purpan, Ctr Traitement Hemophiles, F-31052 Toulouse, France
[6] Catholic Univ Louvain, Serv Paediat Hematol, B-3000 Louvain, Belgium
[7] Inst Hemophilia, N-0986 Oslo, Norway
[8] Great Ormond St Hosp Sick Children, London WC1N 3JH, England
[9] Childrens Hosp, Dept Haematol, Birmingham B16 8ET, W Midlands, England
[10] Hamophiliezentrum, CH-3084 Wabern, Switzerland
[11] Univ Bern, Childrens Hosp, CH-3012 Bern, Switzerland
[12] Univ Frankfurt Hosp, Dept Paediat, D-60596 Frankfurt, Germany
[13] Osped Bambini Di Cristina, Clin Paediat Univ, Ctr Emofilia, I-90127 Palermo, Italy
[14] Graz Univ, Klin Kinder & Jugendheilkunde, A-8037 Graz, Austria
[15] Karolinska Hosp, Dept Paediat, S-17176 Stockholm, Sweden
[16] Hosp Dona Estefania, Hematol Serv, P-1150 Lisbon, Portugal
[17] Rigshosp, Juliane Marie Ctr, Dept 5002, Haemophilia Ctr, DK-2100 Copenhagen, Denmark
[18] Univ Helsinki, Hosp Children & Adolescents, FIN-00290 Helsinki, Finland
[19] Tallaght Hosp, Natl Childrens Hosp, Natl Haemophilia Ctr, Dublin 24, Ireland
[20] Hosp Gen Valle Hebron, E-08035 Barcelona, Spain