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  Indian J Med Microbiol
 

Figure 12: longitudinal section of diaphragm muscle showing in: (a) Control group few cells (↑) with positive CD68 expression. (b) Nicotine-injected group an apparent increase in cells with positive CD68 expression (↑). (c) Caffeine-injected Group III a similar expression of CD68 (↑) to control. (d) Group IV an apparent increase in positive CD68-expressing cells (↑) (IHC for CD68 × 20)

Figure 12: longitudinal section of diaphragm muscle showing in: (a) Control group few cells (↑) with positive CD68 expression. (b) Nicotine-injected group an apparent increase in cells with positive CD68 expression (↑). (c) Caffeine-injected Group III a similar expression of CD68 (↑) to control. (d) Group IV an apparent increase in positive CD68-expressing cells (↑) (IHC for CD68 × 20)