[1] Univ Alberta, Dept Phys Therapy, Edmonton, AB T6G 2G4, Canada
[2] Royal Childrens Hosp, Childrens Canc Ctr, Parkville, Vic 3052, Australia
[3] Murdoch Childrens Res Inst, Parkville, Vic 3052, Australia
[4] Univ Melbourne, Dept Paediat, Parkville, Vic 3052, Australia
[5] Univ Alberta, Fac Med, Dept Oncol, Edmonton, AB T6G 2R3, Canada
[6] Alberta Hlth Serv, Canc Care Alberta, Edmonton, AB T5J 3E4, Canada