1 Department of Radiological Sciences, Diagnostic Imaging Unit, Azienda Ospedaliera Universitaria Senese, Viale Bracci, Siena, Italy.
2 Department of Medicine, Surgery and Neurosciences, Respiratory Diseases Unit, University of Siena, Azienda Ospedaliera Universitaria Senese, Viale Bracci, Siena, Italy.
3 Department of Medical, Surgical and Neuro Sciences, Diagnostic Imaging Unit, University of Siena, Siena, Italy.
4 Department of Medical, Surgical and Neuro Sciences and Radiological Sciences, Diagnostic Imaging Unit, University of Siena, Azienda Ospedaliera Universitaria Senese, Siena, Italy.