Study	Reason for exclusion
Cherkasova 2016	The comparison between CBT alone versus CBT combined with medication was not a type of comparison prespecified in our protocol (Lopez 2013).
Mitchell 2013	The goal of the current study was to assess the preliminary efficacy of mindfulness, without introducing other treatment modalities such as CBT.
Philipsen 2015	This study compared group psychotherapy versus individual psychotherapy, affecting the comparability of the intervention of interest for our review.
Serra‐Pla 2017	The goal of the current study was to assess the efficacy of virtual reality and mindfulness, without introducing other treatment modalities such as CBT.
Weiss 2012	The comparison between CBT plus dextroamphetamine versus CBT plus placebo was not a type of comparison prespecified in our protocol (Lopez 2013)
Young 2015	The comparison between medication plus TAU versus medication plus CBT was not a type of comparison prespecified in our protocol (Lopez 2013), due to the fact that TAU was defined by the study authors as receiving usual treatment, which included both pharmacological and non‐pharmacological treatments
Young 2017	The comparison between medication plus TAU versus medication plus CBT was not a type of comparison prespecified in our protocol (Lopez 2013), due to the fact that TAU was defined by the study authors as receiving usual treatment, which included both pharmacological and non‐pharmacological treatments

CBT: cognitive‐behavioural therapy; TAU: treatment as usual.