Fig. 4From: High-throughput scaffold-free microtissues through 3D printingImages of Calcein-AM (green), ethidium homodimer 1 (red), and Hoechst 33342 fluorescence (blue) staining of (a and b) h-PMSC and (c) h-ISMC at 72 h, Scale bar = 200 μm for each (a-c)Back to article page