Figure 4.
Grades of immunostaining for arginase-1 in the 14 hilar and 14 peripheral ICCs. The immunostaining grades were: 1+, 1%≤p (positive cells) <5%; 2+, 5%≤p<10%; 3+, 10%≤p<40%; 4+, 40%≤p<70%; 5+, p≥70%.
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