objectives : schizophrenia patients often experience relapses once and even more with no limit on number of relapses. the time among relapses are rarely considered in studies. the aim of this study was to identify some risk factors of time to elapses in schizophrenic patients with recurrent events model in survival analysis. methods : in a retrospective longitudinal study, the medical records o...

background : primary central nervous system involvement and central nervous system relapse are poor prognostic events in acute lymphoblastic leukemia. due to severe skeletal and endocrine complications of craniospinal radiotherapy, only cranial radiotherapy is advisable. however only 15% of the cases with central nervous system relapse may remain in remission; a second central nervous system or...