1 Fischell Department of Bioengineering, University of Maryland, College Park, Maryland, USA.
2 Department of Bioengineering, Rice University, Houston, Texas, USA.
3 Institute of Biomedical Engineering, Department for Medical Technologies and Regenerative Medicine, Eberhard Karls University, Tübingen, Tübingen, Germany.
4 NMI Natural and Medical Sciences Institute at the University Tübingen, Reutlingen, Germany.
5 Department of Bioengineering, Hanyang University, Seoul, South Korea.
6 Department of Regenerative Biomaterials, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands.
7 School of Materials Science and Engineering, Institute for Regenerative Medicine and Biomimetic Materials, Tsinghua University, Beijing, China.