Received: 7 June 2019
Accepted: 1 October 2019
First Online: 27 November 2019
Ethics approval and consent to participate
: Each included patient signed an informed consent to ultrasound execution and data collection. The local ethical committee approved the execution of the present study (Comitato Etico Regionale Marche, CERM Prot. N 2015 0486OR).
: Not applicable
: The authors declare that they have no competing interests.