Table 1.

Number of included studies per psychiatric disorder and study design

Disorder	Double‐blind, randomized, sham‐controlled (n)	Single‐blind, randomized, sham‐controlled (n)	Open‐label	Retrospective
PTSD	6	0	1	2
GAD	2	0	2	0
SP	1	1	0	0
PD	2	0	0	0