Corrigendum: Efficacy of an ACT and compassion-based ehealth program for self-management of chronic pain (iACTwithPain): study protocol for a randomized controlled trial - Carvalho, Sérgio A.; Trindade, Inês A.; Duarte, Joana; Menezes, Paulo; Patrão, Bruno; Nogueira, Maria Rita; Guiomar, Raquel; Lapa, Teresa; Pinto-Gouveia, José; Castilho, Paula (Frontiers in Psychology, 2023)