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Fig. 9. Mean number of BrdU-ir cells (per 100 µm lamella length) plotted against
mean plasma T4 levels for each sampling date. (A,B) Single and
clustered BrdU-ir cells considered together. The data indicate a significant
positive correlation in the basal cell layer (A) but not in the mid-apical
cell layer (B), suggesting that T4-induced proliferation is
restricted to the basal cell layer. (C,D) Single BrdU-ir cells only. The data
show a significant positive correlation in the basal cell layer (C) but not in
the mid-apical cell layer (D).