Jeroen J Bax1, Victoria Delgado2. 1. Department of Cardiology, Heart Lung Center, Leiden University Medical Center, Albinusdreef 2, Leiden 2300 RC, The Netherlands j.j.bax@lumc.nl. 2. Department of Cardiology, Heart Lung Center, Leiden University Medical Center, Albinusdreef 2, Leiden 2300 RC, The Netherlands.