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An error occurred in the Medical News & Perspectives article entitled "Controversy Grows Over Monitoring System for New Schizophrenia Drug," published in the November 21 issue of The Journal (1990;264:2488, 2491). On page 2488, the second sentence in the third column should have read as follows: "In England, where clozapine has been in use for several years, WBC testing for patients who are beginning clozapine therapy requires a minimum blood monitoring frequency (operated through a centralized system) of weekly testing for the first 18 weeks (not 'therapy is only mandated every 2 weeks') and then every 2 weeks thereafter (not 'After 18 months, monitoring moves to a monthly basis.')."
Incorrect Information. JAMA. 1991;265(15):1953. doi:10.1001/jama.1991.03460150057023