3841
Radioimmunoassay of serum creatine kinase B isoenzyme in the diagnosis of acute myocardial infarction .
 creatine kinase B isoenzyme
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 creatine kinase B isoenzyme