Note: Funding Information: POKER (PICU Oncology Kids in Europe Research group) research consortium: Martine van Grotel1, Eva Tschiedel2, Christian Dohna-Schwake2, Martin F. Krause3, Josephus P. J. van Gestel4, Patrick Marquis5, Omer Aziz6, Marry M. van den Heuvel-Eibrink11Princess Máxima Center for Pediatric Oncology, Utrecht, the Netherlands;2Department of Pediatric Intensive Care, Universitätsklinik Essen, Essen, Germany;3Department of Pediatrics, Universitätsklinikum Schleswig-Holstein, Kiel, Germany;4Department of Pediatric Intensive Care, Wilhelmina Children’s Hospital/University Medical Center Utrecht, Utrecht, the Netherlands;5Department of Pediatric Intensive Care, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland;6Department of Pediatric Intensive Care, Royal Bristol Children’s Hospital, Bristol, UK.