[1] McGill Univ, Sch Phys & Occupat Therapy, Fac Med, 3630 Promenade Sir William Osler,Hosmer House, Montreal, PQ H3G 1Y5, Canada
[2] Univ Quebec Trois Rivieres, Dept Chiroprat, Trois Rivieres, PQ, Canada
[3] St Annes Rd Chiropract, Winnipeg, MB, Canada
[4] Univ Winnipeg, Fac Sci, Winnipeg, MB, Canada
[5] Canadian Mem Chiropract Coll, Dept Clin Educ, Toronto, ON, Canada
[6] Univ Quebec Trois Rivieres, Dept Sci Act Phys, Trois Rivieres, PQ, Canada
[7] Dalhousie Univ, Dept Community Hlth & Epidemiol, Halifax, NS, Canada
[8] Mt Royal Univ, Fac Hlth & Community Studies, Calgary, AB, Canada
[9] Univ Toronto, Dalla Lana Sch Publ Hlth, Univ Hlth Network, Toronto Western Res Inst, Toronto, ON, Canada
[10] Univ Quebec Trois Rivieres, Dept Anat, Trois Rivieres, PQ, Canada
[11] Univ Manitoba, Fac Kinesiol & Recreat Management, Winnipeg, MB, Canada
[12] Univ Guelph, Human Hlth & Nutr Sci, Guelph, ON, Canada
[13] Downsview Chiropract, Toronto, ON, Canada
[14] Rush Univ, Hlth Syst Management, Chicago, IL 60612 USA