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Common fabrication techniques used for the creation of spheroids, organoids, and cell sheet (A) (i) Hanging drop method (ii) Spontaneous spheroid formation (iii) suspension culture (iv) ECM method (v) Magnetic levitation method, (vi) Microfluidic device method. Altered and reproduced with permission from [27] under Open Access CC BY 4.0. MDPI (B) Schematic representation of cell sheet engineering.
