PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 27974949-11 2016 The levels of pO2 were positively related with the gray values of Ki67 and negatively related with the values of HIF-1 alpha and CK20 (P < 0.05). PO-2 14-17 keratin 20 Homo sapiens 129-133