https://cdn.who.int/media/docs/default-source/biologicals/documents/trs_978_annex_3.pdf?sfvrsn=fe61af77_3&download=true
https://www.ema.europa.eu/documents/scientific-guideline/guideline-virus-safety-evaluation-biotechnological-investigational-medicinal-products_en.pdf
https://www.fda.gov/media/156896/download
https://www.ema.europa.eu/documents/other/questions-answers-comparability-considerations-advanced-therapy-medicinal-products-atmp_en.pdf
https://www.ema.europa.eu/documents/scientific-guideline/toolbox-guidance-scientific-elements-regulatory-tools-support-quality-data-packages-prime-certain_en.pdf
https://cdn.who.int/media/docs/default-source/biologicals/documents/trs_978_annex_3.pdf?sfvrsn=fe61af77_3&download=true
https://admin.ich.org/sites/default/files/2019-04/ICH_Considerations_General_Principles_Risk_of_IGI_GT_Vectors.pdf