2495
No significant differences between the two treatment groups were found , but rapid responders had a smaller mean initial platelet - associated IgG index which returned more rapidly and more permanently to normal than that of slow responders .
 platelet - associated IgG
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 platelet - associated IgG