“…Since then, particularly notable work relating to outcome standardization has been undertaken by the OMERACT (Outcome Measures in Rheumatology) initiative [22], which has advocated the use of COS, designed using consensus techniques, in clinical trials in rheumatology since their first conference in 1992 [23]. OMERACT has served a critical role in the development and validation of clinical and radiographic outcome measures in rheumatoid arthritis (RA), osteoarthritis, psoriatic arthritis, fibromyalgia and other future science group Perspective Tunis, Clarke, Gorst et al…”