Guided Web-Based Cognitive Behavior Therapy for Perfectionism: Results From Two Different Randomized Controlled Trials. - Rozental, Alexander; Shafran, Roz; Wade, Tracey D; Kothari, Radha; Egan, Sarah J; Ekberg, Linda; Wiss, Maria; Carlbring, Per; Andersson, Gerhard (Journal of Medical Internet Research, 2018)