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. 2009 Apr 6;22(1):71–78. doi: 10.1293/tox.22.71

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©2009 The Japanese Society of Toxicologic Pathology

This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives (by-nc-nd) License.

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Fig. 4. — Histopathological findings for the DHPN groups (groups 1–6) in experiment 2. A, group 1 (quartz); B, group 6 (DHPN control), adenocarcinoma indicated by the arrow; C, group 2 (CuO micro), hyperplasia indicated by the arrow; D, group 3 (CuO nano); E, group 4 (TiO₂ micro), adenoma indicated by the arrow; F, group 5 (TiO₂ nano). The magnification in A–F is 12.5×.