[1] Univ Maiduguri, Coll Med Sci, Dept Physiotherapy, Maiduguri, Nigeria
[2] Univ Ibadan, Coll Med, Dept Physiotherapy, Ibadan, Nigeria
[3] Univ Calif San Diego, Dept Family & Prevent Med, Div Behav Med, San Diego, CA 92103 USA
[4] Univ Ghent, Fac Med & Hlth Sci, Dept Movement & Sports Sci, B-9000 Ghent, Belgium