Links
[1] https://www.sciensano.be/en/people/johan-van-der-heyden/biblio
[2] https://www.sciensano.be/en/biblio?f%5Bkeyword%5D=1956&f%5Bsearch%5D=chronique
[3] https://www.sciensano.be/en/biblio?f%5Bkeyword%5D=750&f%5Bsearch%5D=CONTACT
[4] https://www.sciensano.be/en/biblio?f%5Bkeyword%5D=5634&f%5Bsearch%5D=CONTACTS
[5] https://www.sciensano.be/en/biblio?f%5Bkeyword%5D=519&f%5Bsearch%5D=de
[6] https://www.sciensano.be/en/biblio?f%5Bkeyword%5D=25185&f%5Bsearch%5D=enqu%C3%AAte%20de%20sant%C3%A9
[7] https://www.sciensano.be/en/biblio?f%5Bkeyword%5D=582&f%5Bsearch%5D=ET
[8] https://www.sciensano.be/en/biblio?f%5Bkeyword%5D=585&f%5Bsearch%5D=LE
[9] https://www.sciensano.be/en/biblio?f%5Bkeyword%5D=531&f%5Bsearch%5D=rapport
[10] https://www.sciensano.be/en/biblio?f%5Bkeyword%5D=837&f%5Bsearch%5D=sant%C3%A9
[11] https://www.sciensano.be/en/biblio?f%5Bkeyword%5D=840&f%5Bsearch%5D=Service
[12] https://www.sciensano.be/en/biblio?f%5Bkeyword%5D=2613&f%5Bsearch%5D=Services
[13] https://www.sciensano.be/en/biblio?f%5Bkeyword%5D=1683&f%5Bsearch%5D=utilisation