Funding for this research was provided by:
the Ministry of Health & Welfare, Republic of Korea (HI15C2424)
the Ministry of Science and ICT (NRF-2017R1A2B3007362)
Received: 14 September 2020
Accepted: 4 January 2021
First Online: 3 February 2021
Ethics approval and consent to participate
: This study used fresh frozen porcine knees are derived as a by-product of the food industry which is not subject to Institutional Review Board or the Animal experimentation Ethics Committee approval. We obtained the porcine knees by Cellumed (Seoul, Korea).
: Not applicable.
: The authors declare that they have no conflicts of interest in the authorship and publication of this article.