title: Severity and the stressor criterion in post-traumatic stress disorder.
authors.forename: M A
authors.initials: MA
authors.lastname: Simpson
mesh_terms: D000063:Accidents, Traffic / Q000523:psychology*; D000223:Adaptation, Psychological; D006801:Humans; D011569:Psychiatric Status Rating Scales; D013313:Stress Disorders, Post-Traumatic / Q000145:classification / Q000175:diagnosis* / Q000523:psychology