From *McMaster University, Hamilton, Ontario, Canada, †St Joseph’s Healthcare, Hamilton, Ontario, Canada, ‡Department of Epidemiology & Preventive Medicine, Monash University, Melbourne, Australia, §Sunnybrook and Women’s College Health Sciences, Toronto, Ontario, Canada, ∥Private Practice, Belleville, California, and the ¶Northwestern Health Sciences University, Bloomington, Indiana.
Supported by grants from NIH subcontract though Palmer Center for Chiropractic Research #AT 00170-05; and Hamilton Hospital Assessment Centre Research Fund.
The manuscript submitted does not contain information about medical device(s)/drug(s).
Federal and Foundation funds were received to support this work. No benefits in any form have been or will be received from any commercial party related directly or indirectly to the subject of this manuscript.
Address correspondence and reprint requests to Ms. Anita R. Gross, McMaster University, Faculty of Health Sciences, School of Rehabilitation Sciences, Institute of Applied Health Sciences, 1400 Main St West, 4th Floor, Hamilton, Ontario, Canada L8S 1C7; E-mail: [email protected]