1188
Because of the small number of visceral angiography procedures performed ( 38 ) , no definitive conclusions could be drawn as to the differences between ionic and nonionic agents regarding grade - 2 and grade - 3 adverse events .
 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