1. Department of Orthopaedics, Erasmus MC, University Medical Center Rotterdam, Rotterdam, the Netherlands.
2. Department of Otorhinolaryngology, Erasmus MC, University Medical Center Rotterdam, Rotterdam, the Netherlands.
3. Department of Bioengineering, University of Pennsylvania, Philadelphia, Pennsylvania.
4. Shanghai Tissue Engineering Key Laboratory, Department of Plastic and Reconstructive Surgery, Shanghai 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P.R. China.