2685
Direct exposure to 2,3,7,8-tetrachlorodibenzo-p-dioxin ( TCDD ) increases infectivity of human erythrocytes to a malarial parasite .
 human erythrocytes
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:
 human erythrocytes