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- Kirstine Kobberøe Søgaard⇑,
- Claus Sværke,
- Reimar Wernich Thomsen and
- Mette Nørgaard
- Dept of Clinical Epidemiology, Institute of Clinical Medicine, Aarhus University Hospital, Aarhus, Denmark
- Kirstine Kobberøe Søgaard, Dept of Clinical Epidemiology, Aarhus University Hospital, Olof Palmes Allé 43–45, 8200 Aarhus N, Denmark. E-mail: kks{at}clin.au.dk