Funding for this research was provided by:
Pfizer Pharmaceuticals (N/A)
Received: 26 February 2020
Accepted: 15 June 2020
First Online: 24 June 2020
Ethics approval and consent to participate
: Written informed consent was obtained from patients and parents. The study protocol was approved by the Medical Ethics Committee of the Erasmus University Medical Center, Rotterdam.
: Not applicable.
: Investigator-initiated study for which AHK received an independent research grant from Pfizer. The other authors declared no conflict of interest exists.