Received: 9 June 2021
Accepted: 6 October 2021
First Online: 28 October 2021
: The study was approved by the Research Ethics Committees (MRECs) of Erasmus MC (ID Number MEC-2010-092). Consent was obtained from all subjects. Both parents and children > 12 years provided written informed consent. The study was performed in accordance with the Declaration of Helsinki.This cohort study is based on existing data. An ethical medical approval was not required, since the analysis is secondary research-based. Note that the original studies were approved by ethics committees.
: Not applicable.
: The authors declare that they have no competing interests.