19141
As regards to the safety assessment , there was no significant difference about the risk of stent thrombosis and bleeding between TAT and DAT group , while the risk of gastrointestinal trouble was significantly higher in TAT group ( OR = 2 . 46 , 95 % CI = 1 . 25 - 4 . 86 ; P < . 01 ) .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None