Text and Data Mining valid from 2018-11-30
Received: 12 September 2018
Accepted: 22 November 2018
First Online: 30 November 2018
Compliance with Ethical Standards
: The authors declare that they have no conflict of interest.
: For this type of study, formal consent is not required.
: This study has obtained IRB approval from research ethics board (University Health Network), and the need for informed consent was waived.
: For this type of study, consent for publication is not required.