1 Semeiotica Medica Unit, Department of Medical and Surgical Sciences, Alma Mater Studiorum University of Bologna and Azienda Ospedaliera-Universitaria Policlinico S. Orsola-Malpighi, Bologna, Italy.
2 Semeiotica Medica Unit, Department of Medical and Surgical Sciences, Alma Mater Studiorum University of Bologna and Azienda Ospedaliera-Universitaria Policlinico S. Orsola-Malpighi, Bologna, Italy. Electronic address: paolo.caraceni@unibo.it.