4000
In elderly healthy subjects , Type II receptors were also significantly decreased (from 1796 +/- 671 to 720 +/- 345).
 Type II receptors
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 Type II receptors