title: THE PROBLEM OF VALIDITY IN FIELD STUDIES OF PSYCHOLOGICAL DISORDER.
mesh_terms: D035843:Biomedical Research; D001699:Biometry; D003933:Diagnosis; D004813:Epidemiology; D006801:Humans; D001523:Mental Disorders; D013223:Statistics as Topic
keywords: DIAGNOSIS; EPIDEMIOLOGY; MENTAL DISORDERS; REVIEW; STATISTICS