1. Cardiology Department (A.M.), University Hospital, Clermont-Ferrand, France.
2. Cardiac Surgery Department (Y.B., M.F., L.C., N.d’O.), University Hospital, Clermont-Ferrand, France.
3. Institut Pascal, Université Clermont Auvergne, CNRS, SIGMA Clermont, Clermont-Ferrand, F-63000, France (L.C., N.d’O.).