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(A) Surface morphology of track-etched polyester transwells with randomly distributed pores and pore-cast PCL with larger regularly spaced pores imaged using SEM. Arrows indicate locations of fused circular pores resulting from the track etching process. Scale bar: 10 μm. (B) Table of pore size and total porosity for polyester transwells and porous PCL. *P < 0.05; †P < 0.001.
