Church, Hawk, et al. (2009) conducted an RCT in which 42 military veterans with PTSD were randomly assigned to a treatment group or a wait-list control group. Thirty-two of the initial participants completed the study, including 19 in the treatment group and 13 in the control group.(2 Randomized Controlled Trials; 4 Outcome Studies Using Standardized Tests). Vis / last ned studiet her.