Felson, DT, Redmond, AC, Chapman, GJ, Smith, T, Hamilton, DF, Jones, R, Holt, CA, Callaghan, MJ, Mason, DJ, Conaghan, PG, "Recommendations for the conduct of efficacy trials of treatment devices for osteoarthritis : a report from a working group of the Arthritis Research UK Osteoarthritis and Crystal Diseases Clinical Studies Group", Rheumatology, 2016