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. 2013 Sep 24;8(9):e74398. doi: 10.1371/journal.pone.0074398

Table 3. Summary of the classical immunohistochemical staining scores.

p62/SQSTM1 and Nrf2
High ++ >20% with aggregation or nuclear accumulation
+ >20%
Low ± 10–20%
- <10%