A–F: H&E histology and immunohistochemical labeling for Ym1/Ym2 in extrapulmonary lesions with histiocytic proliferation in p47phox−/− mice. A, B: Lymph node, original magnification ×200. C, D: Spleen, original magnification ×200, ×400, respectively. E, F: Bone marrow, original magnification ×200.