7299
Vascular responses to reactive hyperemia ( with flow increase leading to endothelium - dependent dilation ) and to sublingual glyceryl trinitrate ( GTN ; endothelium - independent dilation ) were recorded .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 None