severe mental illness -- keyword

(psychotic OR psychosis OR psychoses OR schizophren* OR bipolar OR manic-depressive OR "manic depressive" OR suicid* OR manic OR mania OR schizoaffective OR ((mental OR depression OR depressive OR Obsessive-compulsive OR "Obsessive compulsive" OR OCD OR agoraphob* OR panic OR phobia OR phobic OR melanchol* OR neurosis OR neurotic OR neuroses OR "conversion disorder" OR "conversion disorders") AND (severe OR intractable OR prolonged OR treatment-resistant OR "treatment-resistant" OR refractory OR chronic)))