Article History
Received: 2 May 2020
Accepted: 22 October 2020
First Online: 6 November 2020
Ethics approval and consent to participate
: No ethics committee was involved in the study. As of 16.10.2020, according to federal regulations and law (§ 15) of North-Rhine Westphalia, Germany (ExternalRef removed.), epidemiological research need not be submitted to the local ethics committee of the medical faculty Münster, Germany.This was no clinical trial according to WHO definitions, data analysis was conducted according to WHO guidelines (ExternalRef removed). Data collection and analysis were performed anonymously. All patients or their legal guardians have signed a form that their results may be used for medical purposes and analyses.
: Not applicable.
: The authors declare that they have no competing interests.