PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 26489498-4 2015 Rituximab and the newest anti-CD20 antibody obinutuzumab in combination with chlorambucil, as compared with chlorambucil alone, prolonged overall survival in previously untreated patients with significant comorbidities, and the combination of anti-CD20 antibody with chlorambucil has become the standard regimen in this group of patients. Chlorambucil 77-89 keratin 20 Homo sapiens 248-252