1. McGowan Institute for Regenerative Medicine; University of Pittsburgh; Pittsburgh PA USA
2. Key Laboratory of Advanced Technologies of Materials, Ministry of Education, College of Materials Science and Engineering; Southwest Jiaotong University; Chengdu China
3. College of Engineering and Applied Science; University of Cincinnati; Cincinnati OH USA
4. Department of Surgery; University of Pittsburgh; Pittsburgh PA USA
5. Department of Chemical Engineering; University of Pittsburgh; Pittsburgh PA USA
6. Department of Bioengineering; University of Pittsburgh; Pittsburgh PA USA