USAID
1995.
Perceived helpfulness of treatment for posttraumatic stress disorder: Findings from the World Mental Health Surveys.
Depress Anxiety
http://www.ncbi.nlm.nih.gov/pubmed/32667096
Perceived helpfulness of bipolar disorder treatment: Findings from the World Health Organization World Mental Health Surveys.
Bipolar Disord
http://www.ncbi.nlm.nih.gov/pubmed/33638300