Abstract
Rosenheck et al. (Sept. 18 issue)1 reported a comparison of clozapine and haloperidol in patients hospitalized for refractory schizophrenia. They excluded patients previously treated with clozapine but not those previously treated with haloperidol. How many patients had been treated with haloperidol? What would the results show if the patients whose schizophrenia was previously known to be refractory to haloperidol were excluded?

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