title: Immortal time bias in retrospective analysis: is there a survival benefit in patients with glioblastoma who received prolonged treatment of adjuvant valganciclovir?
authors: Division of Hematology and Oncology Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan; Institute of Public Health, National Yang-Ming University, Taipei, Taiwan.
authors: Chia-Jen
authors: CJ
authors: Liu
authors: Yu-Wen
authors: YW
authors: Hu
mesh_terms: D000998:Antiviral Agents / Q000627:therapeutic use*; D001932:Brain Neoplasms / Q000821:virology*; D003587:Cytomegalovirus / Q000187:drug effects*; D005260:Female; D015774:Ganciclovir / Q000031:analogs & derivatives*; D005909:Glioblastoma / Q000821:virology*; D006801:Humans; D008297:Male
chemical_list: D000998:Antiviral Agents; D015774:Ganciclovir