A., de Vet, H. C., Bouter, L. M., Alonso, J., ... & Mokkink, L. B. (2018). COSMIN methodology for assessing the content validity of PROMs–user manual. Amsterdam, Netherlands: VU University Medical Center. Step2a, b, c 1, 8, 15 2, 9, 16 3, 10, 17 ? 4, 11, 18 5, 12, 19 6, 13, 20 7, 14, 21 Step2d,e 22, 27 23, 28 24, 29 25, 30 26, 31 • ߲step1ͱڞ௨