Ganz, Vivian Hoff M.A.1; Gurland, Barry J. MB, MRCP, DPM.1; Deming, Edwards W. Ph.D.2; Fisher, Bernice M.S.1
1Biometrics Research, New York State Department of Mental Hygiene, New York, NY Department of Psychiatry, Columbia University
2Washington, DC, is a consultant in statistical surveys.
Address for reprint requests: Dr. B. J. Gurland, Biometrics Research, 722 West 168 Street, New York, NY 10032.
Received for publication Mar 15, 1971; revision received Aug 27, 1971