1 Odense Patient Data Explorative Network, Institute of Clinical Research, University of Southern Denmark, Odense, Denmark; Department of Medicine, Holbæk Hospital, Holbæk, Denmark. Electronic address: b.abrahamsen@physician.dk.
2 MRC Lifecourse Epidemiology Unit, University of Southampton, Southampton, UK; NIHR Southampton Biomedical Research Centre, University of Southampton and University Hospital Southampton NHS Foundation Trust, Southampton, UK.