Text and Data Mining valid from 2019-02-18
Received: 29 October 2018
Revised: 19 December 2018
Accepted: 18 January 2019
First Online: 18 February 2019
Compliance with ethical standards
: The scientific guarantor of this publication is Professor Stephen Cheng (Head of Department).
: The authors of this manuscript declare no relationships with any companies, whose products or services may be related to the subject matter of the article.
: No complex statistical methods were necessary for this paper.
: Written informed consent was obtained from all subjects (patients) in this study.
: Institutional Review Board approval was obtained.
: • Retrospective• Observational• Single institution