Shallcross AJ, Gross JJ, Visvanathan PD, Kumar N, Palfrey A, Ford BQ, Dimidjian S, Shirk S, Holm-Denoma J, Goode KM, Cox E, Chaplin W, Mauss IB. Relapse prevention in major depressive disorder: Mindfulness-based cognitive therapy versus an active control condition. J Consult Clin Psychol. 2015 Oct; 83(5):964-75.