1. Department of Cardiology, St. Antonius Hospital, Nieuwegein 3435 CM, The Netherlands
2. Department of Cardiology, Diakonessenhuis Hospital, Utrecht 3582 KE, The Netherlands
3. Regionale Ambulance Voorziening Utrecht, Utrecht 3723 BC, The Netherlands
4. Department of Emergency Medicine, St. Antonius Hospital, Nieuwegein, The Netherlands
5. Department of Clinical Chemistry - Saltro part of Unilabs, Utrecht 3565 CE, The Netherlands
6. Department of Clinical Chemistry - St. Antonius Hospital, Nieuwegein, The Netherlands
7. Department of Cardiology, University Medical Center Maastricht, Maastricht 6229 HX, The Netherlands