Langwerden, Robbert J. http://orcid.org/0000-0003-2407-9473
van der Heijden, Paul T. http://orcid.org/0000-0003-3245-1917
Derksen, Jan J. L.
Egger, Jos I. M. http://orcid.org/0000-0002-9311-9013
Article History
Accepted: 1 December 2022
First Online: 21 January 2023
Declarations
:
: These data were collected between 1995 and 1998, at which time ethics approval was not required in the Netherlands with regard to anonymized data. The current study involves secondary data analysis of anonymized data.
: Robbert J. Langwerden, Paul T. van der Heijden, Jan J.L. Derksen and Jos I.M. Egger declare that they have no conflict of interest.