PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 15023434-1 2004 Anti-CD20 antibodies radiolabeled with I-131 tositumomab (Bexxar) or Y-90-Ibritumomab tiuxetan (Zevalin), are similarly efficacious in treating chemotherapy-refractory non-Hodgkin"s lymphoma. tositumomab I-131 58-64 keratin 20 Homo sapiens 5-9