Inter-rater agreement and reliability of the COSMIN (COnsensus-based Standards for the selection of health status Measurement Instruments) Checklist ‌ Mokkink, L, Terwee, C, Gibbons, E, Stratford, P, Alonso, J, Patrick, D, Knol, D, Bouter, L, De Vet, H

The COMET Handbook: version 1.0. ‌ Williamson, P, Altman, D, Bagley, H, Barnes, K, Blazeby, J, Brookes, S, Clarke, M, Gargon, E, Gorst, S, Harman, N, Kirkham, J, McNair, A, Prinsen, C, Schmitt, J, Terwee, C, Young, B

The case for an international patient-reported outcomes measurement information system (PROMIS®) initiative. ‌ Alonso, J, Bartlett, S, Rose, M, Aaronson, N, Chaplin, J, Efficace, F, Leplège, A, Lu, A, Tulsky, D, Raat, H, Ravens-Sieberer, U, Revicki, D, Terwee, C, Valderas, J, Cella, D, Forrest, C

The Omeract-Oarsi core set of outcome domains to measure in clinical trials for people with hip and/or knee osteoarthritis ‌ Smith, T, Hawker, G, Hunter, D, March, L, Shea, B, Christensen, R, Guillemin, F, Terwee, C, Williamson, P, Roos, E, Loeser, R, Schnitzer, T, Kloppenburg, M, Neogi, T, Ladel, C, Kaiser, U, Mobasheri, A, Arden, N, Hochberg, M, Tennant, A, De Wit, M, Tugwell, P, Conaghan, P

Uptake of the OMERACT-OARSI hip and knee osteoarthritis core outcome set: review of randomised controlled trials from 1997 to 2017 ‌ Smith, T, Mansfield, M, Hawker, G, Hunter, D, March, L, Boers, M, Shea, B, Christensen, R, Guillemin, F, Terwee, C, Williamson, P, Roos, E, Loeser, R, Schnitzer, T, Kloppenburg, M, Neogi, T, Ladel, C, Kalsi, G, Kaiser, U, Buttel, T, Ashford, A, Mobasheri, A, Arden, N, Tennant, A, Hochberg, M, De Wit, M, Tugwell, P, Conaghan, P