Treatment resistant schizophrenia (TRS) is the most disabling of all psychiatric illnesses, affecting about 1/3 of patients (~1 million Europeans), a considerable economic and social burden. First-line treatments include atypical (e.g. olanzapine) and typical (e.g. haloperidol) antipsychotics. The original atypical, clozapine, is a final option, and although it is the only antipsychotic shown to b ...