which PTSD patients would improve in social functioning if treated with paroxetine (Lawford et al. 2003).

CONCLUSION

This appendix has examined the evidence for establishing PTSD as a valid disorder by using the five criteria proposed by Robins and Guze (1970): describing the core clinical features; differentiating from other disorders, conducting laboratory studies, determining temporal stability, and determining aggregation in families. The evidence is robust for the core clinical features of PTSD, which appear to be consistent among diverse populations. Progress has been made in fulfilling the remaining criteria.

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