Funding for this research was provided by:
Rijksinstituut voor Volksgezondheid en Milieu
Received: 1 May 2018
Accepted: 10 October 2018
First Online: 30 October 2018
Ethics approval and consent to participate
: The Medical Ethics Review Committee of VU University Medical Center (IRB00002991, FWA00017598) has declared that the Medical Research Involving Human Subjects Act (WMO) does not apply to this study and an official approval of this study by their committee is not required. According to ISO 26362 certificate regulation, people give written consent when signing up to be a member of an online research panel as well as when agreeing to participate in any specific survey sent to them.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.