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. 2018 Apr 23;30(3):316–321. doi: 10.5021/ad.2018.30.3.316

Table 4. Patch test positivity for P-phenylenediamine (n=105).

n (%)
1+ (weakly positive) 44 (41.9)
2+ (strongly positive) 44 (41.9)
3+ (extremely positive) 17 (16.2)