Study	Reason for exclusion
Behar 2010	Cognitive and behavioural therapies were not used in the study, instead attentional therapy was augmented with d‐cycloserine in trait anxiety, which did not meet Diagnostic and Statistical Manual Criteria for Anxiety Disorders
Evins 2012	No cognitive and behavioural therapies
Galovic 2010	Participants had fear of public speaking which did not meet inclusion criteria
Guastella 2007(a)	Spider fear was tested with subclinical anxiety and participants did not meet criteria for specific phobia
Guastella 2007(b)	Subclinical spider fear ‐ does not meet criteria for specific phobia
Gutner 2012	No cognitive and behavioural therapies
Heresco‐Levy 2002	No cognitive and behavioural therapies comparison
Inslicht 2013	No cognitive and behavioural therapies
Levinson 2013	No cognitive and behavioural therapies
NCT00257361 2005	This study was withdrawn prior to participant enrolment
Rajabi 2013	Most participants did not receive cognitive and behavioural therapies in addition to d‐cycloserine or placebo pill.
Rodebaugh 2013	No cognitive and behavioural therapies
Sharp 2013	Participants were children with food refusal, which did not meet inclusion criteria
Steinglass 2007	Participants were patients with anorexia, which did not meet inclusion criteria