Text and Data Mining valid from 2019-12-04
Received: 22 August 2019
Accepted: 28 November 2019
First Online: 4 December 2019
Compliance with ethical standards
: On behalf of all authors, the corresponding author states that there is no conflict of interest.
: No ethical approval was required for information collection in this study as it did not involve the collection of personal information.
: This work did not require a consent form nor used patients or individuals data.