1. K.A. Sluka, PT, PhD, FAPTA, Department of Physical Therapy and Rehabilitation Science, College of Medicine, College of Nursing, Pain Research Program, University of Iowa, 100 Medical Education Bldg, #1-252, Iowa City, IA 52242 (USA).
2. J.M. Bjordal, PT, PhD, Physical Therapy Research Group, Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway; and Centre for Evidence-Based Practice, Bergen University College, Bergen, Norway.
3. S. Marchand, PhD, Département de Chirurgie, Centre de Recherche clinique Étienne-Le Bel du CHUS, Université de Sherbrooke, Québec, Canada.
4. B.A. Rakel, RN, PhD, Department of Physical Therapy and Rehabilitation Science, College of Medicine, College of Nursing, Pain Research Program, University of Iowa.