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The viability of HAECs on the electrospun silk fibroin scaffolds using Live/Dead assay with confocal microscopy on day 1, 4, 7, 14. Viability was maintained and short cord-like structures were observed at day 4 (B), and a complex interconnecting network of capillary tubes with identifiable lumens was demonstrated from day 7 (C–D). Scale bars are 50 μm.
