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Representative images for the expression of the vascular endothelial growth factor receptor 1 (VEGFR1) in testicular tissues in control mice exposed to air, and mice exposed daily for 30 min to water-pipe smoke (WPS) for 6 months. VEGFR1 was overexpressed in the testes of the mice treated with WPS, and was not detected in the control not treated mice. The scale bar equals 50 μm.
