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Moreover, 23.3% of patients with breast cancer showed an overexpression of HER-2/neu protein .
 HER-2/neu protein, HER-2/neu
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:
 HER-2/neu protein, HER-2/neu