1 Department of Cardiology, University Medical Center Groningen, University of Groningen, Hanzeplein 1, PO Box 30.001, 9700 RB, Groningen, The Netherlands.
2 Department of Surgery, Amsterdam UMC, University of Amsterdam, PO Box 22660, 1100 DD, Amsterdam, The Netherlands.
3 Department of Surgery/Vitalys Clinic, Rijnstate Hospital, PO Box 9555, 6800 TA, Arnhem, The Netherlands.
4 Department of Cardiology, Rijnstate Hospital, PO Box 9555, 6800 TA, Arnhem, The Netherlands.
5 Division of Human Nutrition and Health, Wageningen University & Research, PO Box 9101, 6700 HB, Wageningen, The Netherlands.
6 Department of Cardiology, University Medical Center Groningen, University of Groningen, Hanzeplein 1, PO Box 30.001, 9700 RB, Groningen, The Netherlands. tm.gorter@umcg.nl.