Received: 1 May 2019
Accepted: 10 June 2019
First Online: 2 July 2019
Ethics approval and consent to participate
: 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.
: Denis Agostini has received speaker honorarium from Spectrum Dynamics. The other authors declare that they have no competing interests.