[1] Umc Utrecht, Van Creveldklin, Utrecht, Netherlands
[2] Umc Utrecht, Brain Ctr Rudolf Magnus, Dept Rehabil Phys Therapy Sci & Sport, Phys Therapy Res, Utrecht, Netherlands
[3] AMC, Dept Pediat Hematol, Amsterdam, Netherlands
[4] Hosp Sick Children, Dept Paediat, Div Rheumatol, Toronto, ON, Canada
[5] Hosp Sick Children, Dept Pediat Hematol, Toronto, ON, Canada
[6] Christian Med Coll & Hosp, Dept Haematol, Vellore, Tamil Nadu, India
[7] Christian Med Coll & Hosp, Dept Phys Med & Rehabil, Vellore, Tamil Nadu, India
[8] Univ Med Ctr Utrecht, Dept Child Dev & Exercise, Utrecht, Netherlands
[9] Childrens Hosp, Utrecht, Netherlands