Research, Center for Biologics Evaluation and (December 4, 2020). "Tissue Guidances". FDA. Archived from the original on March 19, 2008 – via www.fda.gov.
Research, Center for Biologics Evaluation and (December 4, 2020). "Tissue Guidances". FDA. Archived from the original on March 19, 2008 – via www.fda.gov.