1. Division of Emergency Medicine and Chest Pain Units, Campus Charité Mitte and Campus Virchow Klinikum, Charité – Universitätsmedizin Berlin, Berlin, Germany;
2. Thermo Fisher Scientific, Clinical Diagnostics, B•R•A•H•M•S GmbH, Hennigsdorf, Germany;
3. Department of Angiology, Cardiology and Pneumology, University Hospital Heidelberg, Heidelberg, Germany;
4. Department of Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA, USA;
5. Coronary Care Unit and Heart Failure Program, Veterans Affairs San Diego Healthcare System, UCSan Diego School of Medicine, San Diego, CA, USA