Aleksandra Gąsecka1, Edwin van der Pol, Rienk Nieuwland, Ewa Stępień. 1. 1st Chair and Department of Cardiology, Medical University of Warsaw, Warsaw, Poland; Vesicle Observation Centre, and Laboratory of Experimental Clinical Chemistry, Academic Medical Centre, University of Amsterdam, Amsterdam, Netherlands. aleksandra.gasecka@wum.edu.pl.