Links
[1] https://www.sciensano.be/en/biblio/allergenic-pollen-and-pollinosis-belgium36637
[2] https://www.sciensano.be/en/biblio?f%5Bauthor%5D=1704&f%5Bsearch%5D=M.%20Detandt
[3] https://www.sciensano.be/en/biblio?f%5Bauthor%5D=1728&f%5Bsearch%5D=Nolard%2CN.
[4] https://www.sciensano.be/en/biblio?f%5Bkeyword%5D=20040&f%5Bsearch%5D=allergenic
[5] https://www.sciensano.be/en/biblio?f%5Bkeyword%5D=444&f%5Bsearch%5D=Belgium
[6] https://www.sciensano.be/en/biblio?f%5Bkeyword%5D=42&f%5Bsearch%5D=Europe
[7] https://www.sciensano.be/en/biblio?f%5Bkeyword%5D=1227&f%5Bsearch%5D=pollen