the use of the dsm-iii inclusion and exclusion criteria -- physical mechanism explains the symptoms , symptoms are linked to psychological factors , symptom initiation is under voluntary control , and there is an obvious recognizable environmental goal -- are discussed in the differential diagnosis of somatoform disorder , factitious disorder , malingering , psychological factors affecting physical condition , and undiagnosed physical illness .
C0037650
somatoform disorder
C0015480
factitious