Correction: 3D Bioprinting Technologies for Hard Tissue and Organ Engineering. Materials 2016, 9, 802

Department of Tissue Engineering, Center of 3D Printing & Organ Manufacturing,School of Fundamental Sciences, China Medical University (CMU), No. 77 Puhe Road,Shenyang North New Area, Shenyang 110122, China; aoqiang00@163.com (Q.A.);xhtian@cmu.edu.cn (X.T.); jfan@cmu.edu.cn (J.F.); Weiyj2011@gmail.com (Y.W.);wjhou@cmu.edu.cn (W.H.); tongh007@hotmail.com (H.T.); baishuling@hotmail.com (S.B.)