"Prolonged Exposure vs Supportive Counseling for Sexual Abuse–Related PTSD in Adolescent Girls"
JAMA
http://jama.jamanetwork.com/article.aspx?articleid=1793800 
"Conclusion and Relevance  Adolescents girls with sexual abuse–related PTSD experienced greater benefit from prolonged exposure therapy than from supportive counseling even when delivered by counselors who typically provide supportive counseling."