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. 2017 Apr 20;7:970. doi: 10.1038/s41598-017-01072-0

Table 1.

Six samples with different hole diameters and spacings.

Samples A1 A2 A3 A4 A5 A6
D-S (μm) 100–50 150–50 200–50 100–100 150–100 200–100