1 Department of Internal Medicine, Medical Centre, University of Amsterdam, Amsterdam, The Netherlands w.wieling@amc.nl.
2 Department of Family Medicine, Medical Centre, University of Amsterdam, Amsterdam, The Netherlands.
3 Department of Cardiology, Academic, Medical Centre, University of Amsterdam, Amsterdam, The Netherlands.
4 SEIN - Stichting Epilepsie Instellingen Nederland, Heemstede, The Netherlands.
5 Department of Neurology, Leiden University Medical Centre, Leiden, The Netherlands.
6 Department of Medicine, University of Minnesota, Minneapolis, MN 55455, USA Division of General Internal Medicine, Hennepin County Medical Center, Minneapolis, MN, USA.
7 National Heart & Lung Institute, Imperial College, London, UK.