Received: 8 May 2019
Accepted: 30 May 2019
First Online: 12 June 2019
Compliance with ethical standards
: Rosalinda Calandrelli declares that she has no conflict of interest.Fabio Pilato declares that he has no conflict of interest.Luca Massimi declares that he has no conflict of interest.Marco Panfili declares that he has no conflict of interest.Concezio Di Rocco declares that he has no conflict of interest.Cesare Colosimo declares that he is scientific consultant for Bracco Diagnostics Inc. and Bayer HealthCare.
: Ethical approval: We declare that all procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. For this type of study, formal consent is not required.
: Informed consent was obtained from all individual participants included in the study.