Pain Anxiety Symptoms Scale-20: An empirical evaluation of measurement invariance across race/ethnicity, sex, and pain.
Rogers AH, Gallagher MW, Garey L, Ditre JW, Williams MW, Zvolensky MJ. Pain Anxiety Symptoms Scale-20: An empirical evaluation of measurement invariance across race/ethnicity, sex, and pain. Psychol Assess. 2020 Sep; 32(9):818-828.