Article History
Received: 24 July 2018
Revised: 17 November 2018
Accepted: 11 December 2018
First Online: 17 December 2018
Compliance with ethical standards
: The authors confirm that this was a retrospective analysis of case notes with no risk of harm to subjects and no inclusion of patient identifying information. Therefore, no consent from patients was indicated and ethical approval was not required.
: The authors declare that they have no conflict of interest.