Karatzias, T., Gumley, A., Power, K., & O'Grady, M. (2007). Illness appraisals and self-esteem as correlates of anxiety and affective comorbid disorders in schizophrenia. Comprehensive Psychiatry, 48(4), 371-375. https://doi.org/10.1016/j.comppsych.2007.02.005