Research Article

Assessment of Control Tissue for Gene and Protein Expression Studies: A Comparison of Three Alternative Lung Sources

Figure 2

Immunohistochemical staining for CD68. The distribution of CD68+ macrophages in lung cancer resection (a), transplant biopsy (b), and pneumothorax (c). Magnification 250x.
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(a)
523840.fig.002b
(b)
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(c)