Drop out from out-patient mental healthcare in the World Health Organization's World Mental Health Survey initiative.
British Journal of Psychiatry
http://www.ncbi.nlm.nih.gov/pubmed/?term=Drop%20out%20from%20out-patient%20mental%20healthcare%20in%20the%20World%20Health%20Organization%27s%20World%20Mental%20Health%20Survey%20initiative.