physiological responses to self-generated imagery of past traumatic combat experiences were assessed in medication-free vietnam combat veterans , classified on the basis of dsm-iii-r ( american psychiatric association 1987 ) criteria into posttraumatic stress disorder ( ptsd , n = 25 ) , non-ptsd anxiety disorder ( anxious , n = 7 ) , or no-mental-disorder ( healthy , n = 15 ) groups .
C0038436
ptsd
C0003469
anxiety disorder