The pores inside ranged from 31.8 to 108.5 mm. The ratios of pores
with 110–80 mm, 80–60 mm, 60–30 mm diameters were 28.9%, 33.3%,
37.8%, respectively (Fig. 2c). Based on the previous study that the
aperture size could be extremely crucial to the cells growing in the
scaffold [15]