1 Department of Cardiovascular Surgery, GVM Care and Research, Santa Maria Hospital, Via Antonio de Ferraris, 22, Bari BA 70124, Italy. Electronic address: pg.malvindi@hotmail.com.
2 Department of Cardiac Surgery, Central Clinical Hospital of the Ministry of Interior, Centre of Postgraduate Medical Education, Warsaw, Poland.
3 Department of Cardiovascular Surgery, GVM Care and Research, Santa Maria Hospital, Bari, Italy.