Article History
Received: 23 January 2020
Accepted: 9 April 2020
First Online: 8 May 2020
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest.
: For this type of study, formal consent is not required.
: For this type of study, informed consent is not required.
: For this type of study, consent for publication is not required (there is no patient-identifying data).