1 Department of Cardiac Surgery, Città di Lecce Hospital, GVM Care & Research, Lecce, Italy.
2 Department of Anesthesiology, Città di Lecce Hospital, GVM Care & Research, Lecce, Italy.
3 Department of Cardiac Surgery, Città di Lecce Hospital, GVM Care & Research, Lecce, Italy; Department of Cardiac Surgery, Paracelsus Medical University, Breslauerstrasse, 201-90471 Nuremberg, Germany. Electronic address: gsantarpino@gvmnet.it.