3002
The highest postoperative CK - MB level was less after BC ( BC , 31 + / - 17 U / L ; CC , 56 + / - 13 U / L ; p less than 0 . 05 ) .
 CK - MB
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 CK - MB