Quittkat, H. ., Düsing, R. ., Holtmann, F. ., Buhlmann, U. ., Svaldi, J. ., & Vocks, S. . Perceived Impact of Covid-19 Across Different Mental Disorders: A Study on Disorder-Specific Symptoms, Psychosocial Stress and Behavior. Frontiers in Psychology, 11, 586246. https://doi.org/10.3389/fpsyg.2020.586246 (Original work published 2020)