Perceived helpfulness of treatment for posttraumatic stress disorder: Findings from the World Mental Health Surveys.

Stein DJ, Harris MG, Vigo DV, Tat Chiu W, Sampson N, Alonso J, Altwaijri Y, Bunting B, Caldas-de-Almeida JM, Cía A, Ciutan M, Degenhardt L, Gureje O, Karam A, Karam EG, Lee S, Medina-Mora ME, Mneimneh Z, Navarro-Mateu F, Posada-Villa J, Rapsey C, Torres Y, Carmen Viana M, Ziv Y, Kessler RC.