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Fabrication of in vitro 3D models: Intervascular such as Torus (i), Hilbert curve (ii) shaped patterns, and multi-vascular alveolar 3D model (iii) developed by irradiation of 20% polyethylene glycol diacrylate (PEGDA) and photoinitiator (tartrazine, curcumin, anthocyanin) solution (Reproduced from Zhang et al. [173] and Zhang et al. [174].).
