Received: 9 August 2019
Accepted: 24 June 2020
First Online: 10 July 2020
Ethics approval and consent to participate
: The participants were tested individually in a quiet room according to the principles established by the Declaration of Helsinki. The investigation was approved by the Ethical Committee of the NHS Local Health Unit (Azienda Sanitaria Locale 1) that approved the experimental protocol prior to the recruitment of participants, according to the principles established by the Declaration of Helsinki. Informed consent in written form was obtained from all the participants before the study.
: The participants provided informed written consent to publish, though no personal and/or identifiable information has been published.
: This paper has not been submitted to any other journals, and the authors declare no conflict of interest. All the authors revised and approved the manuscript.