Links
[1] https://www.sciensano.be/sites/default/files/alternative_methods_within_ppp_data_requirements_2020_07_30.pdf
[2] https://www.sciensano.be/nl/people/philippe-castelain-0/biblio
[3] https://www.sciensano.be/nl/biblio?f%5Bkeyword%5D=36642&f%5Bsearch%5D=alternative%20testing%20methods
[4] https://www.sciensano.be/nl/biblio?f%5Bkeyword%5D=36643&f%5Bsearch%5D=PPP