1. PEDEGO Research Unit, Medical Research Center Oulu, University of Oulu and Department of Children and Adolescents, Oulu University Hospital, Oulu, Finland
2. Department of Anaesthesiology and Intensive Care Medicine, University Medical Centre Schleswig-Holstein, Campus Kiel, Kiel, Germany
3. Swisstom AG, Landquart, Switzerland; and
4. Department of Natural Sciences, Middlesex University, London, United Kingdom