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Figure 4 Comparison of the healing response to STARFlex and BioSTAR devices after 30 days to 2 years follow-up. Photos of the gross appearance of the devices were taken immediately after sacrifice and dissection of the hearts. For comparison, the right atrial surface of STARFlex control (A, C, E, G) or BioSTAR devices (B, D, F, H, I) is always shown. The orifice of the coronary sinus is located at the bottom in each of the pictures. Scale in millimeters.