1. University of British Columbia School of Nursing, Vancouver, British Columbia, Canada; Health Canada's Advisory Group on Complementary and Alternative Medicine
2. Centre for Clinical Epidemiology and Evaluation, Vancouver Hospital and Health Sciences Centre, Vancouver, British Columbia, Canada; Health Canada's Advisory Group on Complementary and Alternative Medicine
3. Canadian Memorial Chiropractic College, Toronto, Ontario, Canada; Health Canada's Advisory Group on Complementary and Alternative Medicine
4. University of Toronto Institute for Human Development, Life Course and Aging, Toronto, Ontario, Canada; Health Canada's Advisory Group on Complementary and Alternative Medicine
5. Research Centre for Alternative Medicine, Calgary, Alberta, Canada; Health Canada's Advisory Group on Complementary and Alternative Medicine