Received: 30 December 2020
Accepted: 20 April 2021
First Online: 10 June 2021
: Ethical approval was waived by enquiry to local Ethical Committee ((Ärztekammer Hamburg, PV7288, June 20, 2020) because only anonymized data obtained during routine clinical care were employed for investigation. All study activities had been conducted according to the Declaration of Helsinki of the World Medical Association (as amended by the 64th General Assembly, 2013).
: Not applicable, the manuscript does not contain any individual personal data.
: The authors declare that they have no competing interests.