Funding for this research was provided by:
Yorkshire Cancer Research (L394)
Text and Data Mining valid from 2019-02-22
Received: 11 October 2018
Revised: 3 January 2019
Accepted: 21 January 2019
First Online: 22 February 2019
Compliance with ethical standards
: The scientific guarantor of this publication is Dr. Peter Brown.
: 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.
: John Taylor aided the statistical analysis of this study and is listed as one of the authors.
: Written informed consent was waived by the Institutional Review Board.
: Institutional Review Board approval was waived.
: • retrospective• case-control study• performed across multiple institutions