4030
Although the occurrence of any ventricular ectopic activity , as detected by either or both methods , was common , the incidence was significantly higher ( P less than 0 . 001 ) in patients with coronary heart disease ( 86 percent ; 77 / 90 ) , as compared to that in normal subjects ( 40 percent ; 12 / 30 ) .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 None