1 Respiratory Diseases Unit, Department of Clinical Medicine and Immunological Sciences, Siena University, Siena, Italy.
2 Internal Medicine Unit, Department of Internal Medicine, Geriatrics and Rare Diseases Unit, Bari University.
3 Respiratory Diseases Unit, Department of Clinical Medicine and Immunological Sciences, Siena University, Siena, Italy. Electronic address: laurabergantini@gmail.com.