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Figure 8 Anti-smooth muscle actin (HHF-35) staining (original magnification x40) of representative sections from hibernating myocardium treated with sham redo-thoracotomy (A), transmyocardial implant (B), and holmium:yttrium-aluminum-garnet transmyocardial laser revascularization (C). Note numerous red-staining arterioles in (C) compared with (B) and (A).