1. Department of Cardiology, Imelda Hospital, Imeldalaan 9, 2820 Bonheiden, Belgium
2. Department of Cardiology, University Hospital Leuven, Herestraat 49, 3000 Leuven, Belgium
3. Department of Cardiovascular Surgery, Imelda Hospital, Imeldalaan 9, 2820 Bonheiden, Belgium