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(a) and (c) show the microscope images of patterning MCF-7 cells in confined PEGDA microstructures by a phase difference mode; (b) and (d) are the fluorescent images of (a) and (c), respectively, where viable cells are stained in green and the dead ones in red. Reproduced with permission from Liu et al., Lab Chip 14, 1367 (2014). Copyright 2014 RSC Publishing.
