1. Polar Electro Oy Professorintie 5 90440 Kempele Finland
2. Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences King's College London King's Health Partners London SE1 7EH UK
3. King's College London British Heart Foundation Centre, Department of Clinical Pharmacology King's College London, King's Health Partners, St. Thomas’ Hospital London SE1 7EH UK
4. Institute of Personalized Medicine Sechenov University Moscow Russia