1 Department of Cardiology, Leiden University Medical Center, Albinusdreef 2, Postal zone 2300 RC, 2333 ZA, Leiden, The Netherlands.
2 Department of Cardiology, Leiden University Medical Center, Albinusdreef 2, Postal zone 2300 RC, 2333 ZA, Leiden, The Netherlands. a.j.h.a.scholte@lumc.nl.