1 Department of Health Sciences, Section of Anesthesiology, Intensive Care and Pain, University of Florence, Firenze, Italy. Electronic address: cosimochelazzi@gmail.com.
2 Department of Health Sciences, Section of Anesthesiology, Intensive Care and Pain, University of Florence, Firenze, Italy. Electronic address: pallymanci@hotmail.it.
3 Department of Health Sciences, Section of Anesthesiology, Intensive Care and Pain, University of Florence, Firenze, Italy. Electronic address: gianlucavilla1@gmail.com.
4 Department of Health Sciences, Section of Anesthesiology, Intensive Care and Pain, University of Florence, Firenze, Italy. Electronic address: stefano-romagnoli@hotmail.com.
5 Department of Health Sciences, Section of Anesthesiology, Intensive Care and Pain, University of Florence, Firenze, Italy. Electronic address: araffaele.degaudio@unifi.it.