Stricker, Hans https://orcid.org/0000-0001-9914-7456
Article History
Received: 15 June 2020
Accepted: 22 June 2020
First Online: 6 July 2020
Compliance with Ethical Standards
:
: The author declares that he has no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: For this retrospective study formal consent is not required.
: For this type of study consent for publication is not required.