1977
The secondary end points included creatine kinase peak , ventricular fibrillation / tachycardia within the first 24 hours , death and congestive heart failure within the 30 - day follow - up , and 30 - day left ventricular ejection fraction .
 GENE: creatine kinase
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: creatine kinase