OMERACT PMR Working Group 2020, ' Feasibility and Face Validity of Outcome Measures for Use in Future Studies of Polymyalgia Rheumatica : An OMERACT Study ', The Journal of rheumatology, vol. 47, no. 9, pp. 1379-1384 . https://doi.org/10.3899/jrheum.190575 Nielsen, B D & OMERACT PMR Working Grp 2020, ' Feasibility and Face Validity of Outcome Measures for Use in Future Studies of Polymyalgia Rheumatica : An OMERACT Study ', Journal of Rheumatology, vol. 47, no. 9, pp. 1379-1384 . https://doi.org/10.3899/jrheum.190575 The Journal of rheumatology, 47(9), 1379-1384. Journal of Rheumatology