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Assessment of caspase-9 immunoreactivity.
Notes: C1 (A) and C2 (B) groups: caspase-9-positive cells were not seen. V1 (C) and V2 (D) groups: a few caspase-9-positive cells were observed (arrows). Magnification ×40.
Abbreviations: C1, control group for acute varenicline treatment; C2, control group for chronic varenicline treatment; V1, acute varenicline treatment group; V2, chronic varenicline treatment group.
