1   Research Unit for the Department of Anaesthesiology & Intensive Care, Odense University Hospital, University of Southern Denmark, Odense, Denmark

2   Odense Patient Data Explorative Network (OPEN), Odense University Hospital and Institute of Clinical Research, University of Southern Denmark, Odense, Denmark

,

Gitte Zachariassen

2   Odense Patient Data Explorative Network (OPEN), Odense University Hospital and Institute of Clinical Research, University of Southern Denmark, Odense, Denmark

3   H.C. Andersen Children's Hospital, Odense University Hospital; Department of Clinical Research, University of Southern Denmark, Odense, Denmark

,

Sören Möller

2   Odense Patient Data Explorative Network (OPEN), Odense University Hospital and Institute of Clinical Research, University of Southern Denmark, Odense, Denmark

,

Wilhelmine Ursin Førre

1   Research Unit for the Department of Anaesthesiology & Intensive Care, Odense University Hospital, University of Southern Denmark, Odense, Denmark

,

Ingvild Grøsle

1   Research Unit for the Department of Anaesthesiology & Intensive Care, Odense University Hospital, University of Southern Denmark, Odense, Denmark

,

Susanne Halken

3   H.C. Andersen Children's Hospital, Odense University Hospital; Department of Clinical Research, University of Southern Denmark, Odense, Denmark

,

Anne Maria Herskind

3   H.C. Andersen Children's Hospital, Odense University Hospital; Department of Clinical Research, University of Southern Denmark, Odense, Denmark

,

Thomas Strøm

1   Research Unit for the Department of Anaesthesiology & Intensive Care, Odense University Hospital, University of Southern Denmark, Odense, Denmark

4   Department of Anaesthesiology and Intensive Care, Hospital Sønderjylland, University of Southern Denmark, Odense, Denmark

,

Palle Toft

1   Research Unit for the Department of Anaesthesiology & Intensive Care, Odense University Hospital, University of Southern Denmark, Odense, Denmark

,

Mark Ellebæk

5   Research Unit for Surgery, Odense University Hospital, University of Southern Denmark, Odense, Denmark

6   Research Unit for Surgery, and Centre of Excellence in Gastrointestinal Diseases and Malformations in Infancy and Childhood (GAIN), Odense University Hospital, University of Southern Denmark, Odense, Denmark

,

Niels Qvist

2   Odense Patient Data Explorative Network (OPEN), Odense University Hospital and Institute of Clinical Research, University of Southern Denmark, Odense, Denmark

5   Research Unit for Surgery, Odense University Hospital, University of Southern Denmark, Odense, Denmark

6   Research Unit for Surgery, and Centre of Excellence in Gastrointestinal Diseases and Malformations in Infancy and Childhood (GAIN), Odense University Hospital, University of Southern Denmark, Odense, Denmark

This work was supported by Børnelungefonden, DASAIMs forsknings initiative, OUHs overlægeråds forskningsfond, 53-A2591, Research Council of the Region of Southern Denmark, 18/17564.