[1] Sophiahemmet Univ, Dept Hlth Promot Sci, Box 5605, S-11486 Stockholm, Sweden
[2] Karolinska Inst, Dept Clin Neurosci, Stockholm, Sweden
[3] Norwegian Sch Sport Sci, Dept Sport Med, Oslo, Norway
[4] Karolinska Inst, Inst Environm Med, Unit Intervent & Implementat Res Worker Hlth, Stockholm, Sweden
[5] Ontario Tech Univ, Inst Disabil & Rehabil Res, Fac Hlth Sci, Oshawa, ON, Canada