Sudden gains in routine clinical care: application of a permutation test for trauma-focused cognitive behavioural therapy. - Kuck, Sascha; Ehring, Thomas; Dyer, Anne; Pittig, Andre; Peikenkamp, Jana; Morina, Nexhmedin; Alpers, Georg W.; Krüger-Gottschalk, Antje (European Journal of Psychotraumatology, 2024)