3808
Correlations were found between plasma IFN alpha and receptor Kd on monocytes of AIDS -GR (r = 0.77) and between IFN alpha and plasma cortisol in the same group (r = 0.74).
 monocytes, IFN alpha, IFN alpha, plasma IFN alpha
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:
 monocytes, IFN alpha, IFN alpha, plasma IFN alpha