Corrigendum: Microtissues Enhance Smooth Muscle Differentiation and Cell Viability of hADSCs for Three Dimensional Bioprinting - Jin, Yipeng; Xu, Yongde; Wu, Yuanyi; Sun, Jilei; Guo, Jiaxiang; Gao, Jiangping; Yang, Yong (Frontiers in Physiology, 2017)