1 Department of Anesthesiology, Pain Medicine and Procedural Sedation and Analgesia, Martini General Hospital Groningen, Groningen, the Netherlands, hd.de.boer@mzh.nl Department of Anesthesiology, Child Institute - Hospital das Clinicas, São Paulo University Medical School, São Paulo, Brazil, Pro Matre Paulista Maternity Hospital, São Paulo, Brazil Department of Anesthesiology, Intensive Care and Reanimation, Academisch Ziekenhuis Sint-Jan Brugge-Oostende Campus Sint Jan Brugge, Bruges, Belgium.