1998
We have demonstrated that lipoarabinomannan ( LAM ) from the mycobacterial cell wall, which was virtually devoid of lipopolysaccharide ( LPS ), stimulated mononuclear phagocytes to release IL-6 in a dose-response manner .
 LAM, IL-6, mononuclear phagocytes, lipoarabinomannan
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:
 LAM, IL-6, mononuclear phagocytes, lipoarabinomannan