1 Hospital Clínic, Cardiovascular Clinic Institute, Institut d'Investigacions Biomèdiques August Pi I Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain.
2 Bern University Hospital, University of Bern, Bern, Switzerland.
3 Universitat de Barcelona, Barcelona, Spain.
4 Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain.