11570
Cytomegalovirus , Chlamydia pneumoniae , and Helicobacter pylori IgG antibodies and restenosis after stent implantation : an angiographic and intravascular ultrasound study .
 IgG antibodies
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 IgG antibodies