Correction
In "Decreased Blood Platelet MAO Activity in Unmedicated Chronic Schizophrenic Patients" by Edward F. Domino, M.D., and Sumathy Sampath Khanna, Ph.D. (March 1976 issue), the units of MAO activity were incorrectly described as µmol/mg protein/hour; this should have read nmol/mg protein/hour. This error was pointed out to us and to Dr. Domino by Ross J. Baldessarini, M.D. Dr. Domino has informed us that the problem resulted from typographical errors on the original manuscript and wishes to apologize for any confusion this may have caused Journal readers. The staff wishes to thank Drs. Domino and Baldessarini for correcting this error.