In the control group, none of the physiological or psychological measures altered significantly during the study. On the other hand, in the active treatment group, psychological test (BAI) scores were significantly different at the end of psychotherapy compared to baseline values (t= &p 6 0.001). In concordance the mean 6MWD increased very significantly from 333.15 ฑ70 meter at baseline to 376.9ฑ 64.9 meter after psychotherapy (t & p < 0.001).