Received: 31 July 2019
Accepted: 22 November 2019
First Online: 28 January 2020
Ethics approval and consent to participate
: This retrospective study was approved by the institutional review board. The requirement to obtain informed consent was waived by the institutional review board.
: Consent for publication has been obtained.
: CB received speaking fees from Siemens Healthineers. MHA received speaking fees from Siemens Healthineers and GE Healthcare. The other authors declare that they have no competing interests.