58
Differences in pre- and postoperative values of cancer patients were seen in plasma RIA values : PGE2 and 6-k-PGF1 alpha were significantly higher preoperatively when compared with postoperatively, however, such differences were seen in the control groups as well.
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
 Entities:  
Answer:
 None