Text and Data Mining valid from 2018-06-20
First Online: 20 June 2018
Compliance with ethical standards
: Daniel S Hippe wishes to disclose grants from GE Healthcare, Philips Healthcare, Toshiba America Medical Systems, and Siemens Medical Solutions USA, outside of the submitted work. The rest of the authors have nothing to disclose.
: This article does not contain any studies with human participants or animals performed by any of the authors.
: This was a retrospective review with waiver of informed consent.