Published on in Vol 9 , No 8 (2020) :August

1 Division of Oncology-Hematology , Department of Pediatrics , Kantonsspital Aarau , Aarau , CH
2 Institute of Social and Preventive Medicine , University of Bern , Bern , CH
3 Division of Oncology-Hematology , University Children’s Hospital Basel , Basel , CH
4 University of Basel , Basel , CH
5 Department of Pediatrics , McMaster Children’s Hospital , Hamilton , ON , CA
6 McMaster University , Hamilton , ON , CA
*these authors contributed equally