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. 2021 Feb 16;12:2041731421990536. doi: 10.1177/2041731421990536

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© The Author(s) 2021

This article is distributed under the terms of the Creative Commons Attribution 4.0 License (https://creativecommons.org/licenses/by/4.0/) which permits any use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access page (https://us.sagepub.com/en-us/nam/open-access-at-sage).

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Figure 5. — Biologically derived material. Amniotic membrane is excised from the umbilical cord, processed and preserved on nitrocellulose paper. Amniotic membrane is used for culturing corneal endothelial cells.