For at sikre, at behandlingen kun omfatter patienter svarende til dem, der indgik i undersøgelsen, er indikationen begrænset til patienter, der ikke har responderet på flere seancer med psykoterapi, og for hvilke behandlingen skal kombineres med psykoterapi.
In order to warrant a restriction of treatment to patients who are similar to those that were included in the study, the indication was restricted to patients non-responsive to several sessions of psychological therapy and to be treated in combination with psychological therapy.