1. Division of Engineering in MedicineDepartment of MedicineBrigham and Women's HospitalHarvard Medical School Cambridge MA 02139 USA
2. School of Materials Science and EngineeringWuhan Institute of Technology Wuhan 430205 P.R. China
3. School of Engineering and Applied SciencesHarvard University Cambridge MA 02138 USA
4. Research Institute for Bioscience and Biotechnology Lalitpur 44600 Nepal
5. State Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of Technology Wuhan 430070 P.R. China
6. Center of Biomedical Materials 3D PrintingNational Engineering Laboratory for Polymer Complex Structure Additive Manufacturing Baoding 071000 P.R. China