Author contributions
NB
RvG and VM were responsible for extracting and analysing data, interpreting the results, drafting and reviewing the manuscript. MdB and MF were responsible for the study design, requesting data from the HOVON data center, interpreting the results, drafting and reviewing the manuscript. PvdB was responsible for interpreting the results and provided feedback on the manuscript. DC was responsible for extracting data from the HOVON data center. MvdB and NB provided feedback on the manuscript. All authors read and approved the final manuscript.