Text and Data Mining valid from 2019-02-07
Received: 4 October 2018
Accepted: 28 January 2019
First Online: 7 February 2019
Compliance with ethical standards
: The author(s) declare that they have no competing interests.
: The ROSULA database is an IRB-approved study at the participating centers.
: Patients included in this retrospective analysis had signed an informed consent at the time of surgery.