Köckerling, F.
Adolf, D.
Article History
Received: 5 November 2019
Accepted: 15 December 2019
First Online: 28 January 2020
Compliance with ethical standards
:
: Dr. Köckerling reports personal fees from BARD, outside the submitted work. Dr. Adolf has nothing to disclose.
: This article does not require ethical approval.
: This study does not contain any studies with human participants.
: For this type of study, formal consent is not necessary.