Links
[1] https://www.sciensano.be/en/biblio/de-rol-van-koude-bij-verkoudheid
[2] https://www.sciensano.be/en/biblio?f%5Bauthor%5D=29292&f%5Bsearch%5D=Vankrunkelsven%2CP.
[3] https://www.sciensano.be/en/biblio?f%5Bauthor%5D=29295&f%5Bsearch%5D=Finoulst%2CM.
[4] https://www.sciensano.be/en/people/steven-van-gucht/biblio
[5] https://www.sciensano.be/en/biblio?f%5Bkeyword%5D=519&f%5Bsearch%5D=de