Funding for this research was provided by:
Zorg en Gezondheid
Received: 27 June 2018
Accepted: 29 April 2019
First Online: 17 May 2019
Ethics approval and consent to participate
: The protocol for the constitution of the serum bank was approved by the Ethics committee of the University Hospital and the University of Antwerp (Registration number B300201316922) and the study was reported to the Commission for the Protection of Privacy. Since data were provided unlinked anonymous and residual blood specimens were used, an informed consent was not requested.
: Not applicable.
: The authors declare that they have no competing interests.
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