Shimomura, K., Ando, W., Fujie, H., Hart, D., Yoshikawa, H., & Nakamura, N. (2018). Scaffold-free tissue engineering for injured joint surface restoration. Journal of Experimental Orthopaedics, 5(1), 2. https://doi.org/10.1186/s40634-017-0118-0 (Original work published 2018)