1 Department of Anesthesiology, Intensive Care, Emergency Medicine and Pain Therapy, ZOL Ziekenhuis Oost-Limburg, Schiepse Bos 6, B-3600 Genk, Belgium. Electronic address: cathy.dedeyne@ZOL.be.
2 Faculty of Medicine and Life Sciences, Hasselt University, Belgium.
3 Department of Cardiology, ZOL Ziekenhuis Oost-Limburg, Genk, Belgium.