From the *University of Toronto, Toronto, the †Department of Family and Community Medicine, Toronto, ‡Mount Sinai Hospital, Toronto, §Ajax Pickering General Hospital, Ajax, ∥Canadian Memorial Chiropractic College, Research Division, Toronto, the ¶Kunin-Lunenfeld Applied Research Unit, Baycrest Centre for Geriatric Care, Toronto, #Department of Public Health Sciences, Toronto, and the **Toronto Hospital Research Institute, Toronto, Ontario, Canada.
Acknowledgment date: June 18, 1998.
First revision date: September 17, 1998.
Acceptance date: November 3, 1998.
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Hartley B. Bressler, DC, MD, CCFP
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E-mail: [email protected]
Device status category: 1.