6489
RESULTS : Statistically significant differences were obtained between group I and II concerning the number of patients in whom induced atrial fibrillation with conduction by the accessory pathway and RR < or = 250 msec was found ( 0 vs 6 , p = 0 . 0045 ) .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 None