Funding for this research was provided by:
FOD Volksgezondheid, Veiligheid van de Voedselketen en Leefmilieu (Biocamrisk)
Received: 3 February 2020
Accepted: 10 May 2020
First Online: 11 June 2020
Ethics approval and consent to participate
: Not applicable<b>.</b>
: Not applicable.
: The authors declare that they have no competing interests.