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(a–d) Transition of morphologies of HeLa cells after encapsulation in duplex microcapsules. (e) Cross‐section of multicellular tumor spheroids (MTS) in a duplex microcapsule stained with H&E after 14 days of cultivation. (f) MTS harvested from microcapsules after 18 days of cultivation. (g) MTS formed on agarose gel after 9 days of cultivation. Bar = 150 μm (a–d); 200 μm (e); 300 μm (f,g).
