Text and Data Mining valid from 2019-07-29
Received: 3 January 2019
Accepted: 21 May 2019
First Online: 29 July 2019
Ethics approval and consent to participate
: Ethical approval and consent to participate were not required for this retrospective analysis of non-randomised clinical data. Clinical trial registration was not required.
: Not applicable.
: The authors declare that they have no competing interests.