7819
Stimulation of CD40 on immunogenic human malignant melanomas augments their cytotoxic T lymphocyte -mediated lysis and induces apoptosis .
 cytotoxic T lymphocyte, CD40
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:
 cytotoxic T lymphocyte, CD40