Prevention of haemophilic arthropathy during childhood. May common orthopaedic management be extrapolated from patients without inhibitors to patients with inhibitors? by Rodriguez-Merchan, E, Hedner, U, Heijnen, L, Jimenez-Yuste, V, Lee, C, Morfini, M, Querol, F, Roosendaal, G, Santagostino, E, Solimeno, L