Received: 27 November 2020
Accepted: 19 April 2021
First Online: 29 April 2021
: Approval by an Ethical Committee was not necessary as this study does not involve human participants but only widely available population data. For this reason, the principles of the Declaration of Helsinki do not apply to this study. Informed consent was not deemed to be necessary as this study does not involve any single patient.
: This paper does not involve any single patient so consent for publication is not necessary.
: The Authors declare that they have no competing interest to disclose.