392
RESULTS : Verapamil caused AF promotion in six dogs , increasing mean duration of AF induced by burst pacing , from 8 + / - 4 s ( mean + / - S . E . ) to 95 + / - 39 s ( P < 0 . 01 vs . control ) at a loading dose of 0 . 1 mg / kg and 228 + / - 101 s ( P < 0 . 0005 vs . control ) at a dose of 0 . 2 mg / kg .
 Chemical: Verapamil; Disease: AF; Disease: AF
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: Verapamil; Disease: AF; Disease: AF