1. Andreasen NC. Modified Scale for the Assessment of Negative Symptoms (SANS). Iowa City, The University of Iowa, 1984.
2. Anzai N, Okazaki Y, Miyauchi M, et al. Early neuroleptic medication within one year after onset can reduce risk of later relapses in schizophrenic patients. Annual Report of the Pharmacopsychiatric Research Foundation 1988;19:258–265.
3. Bleuler M. The Schizophrenic Disorders: Long-term Patient and Family Studies (Clemens SM, Trans.). New Haven, Yale University Press, 1978.
4. Cannon-Spoor H, Potkin SG, Wyatt RJ. Measurement of premorbid adjustment in chronic schizophrenia. Schizophr Bull 1982;8:470–484.
5. Crow TJ, MacMillan JF, Johnson AL, Johnstone EC. The Northwick Park study of first episodes of schizophrenia: II. A randomised controlled trial of prophylactic neuroleptic treatment. Br J Psychiatry 1986;148:120–127.