Olanzapine versus haloperidol in the treatment of schizophrenia and schizoaffective and schizophreniform disorders: Results of an international collaborative trial. - Tollefson,G.D.; Beasly,C.M.; Tran,P.V.; Street,J.S.; Krueger,J.A.; Tamura,R.N. (Am J Psychiatr, 1997)