Funding for this research was provided by:
Deutsche Forschungsgemeinschaft (CI 218/1-1)
Universität zu Köln (Gerok program)
Text and Data Mining valid from 2019-12-01
Received: 10 December 2019
Accepted: 10 December 2019
First Online: 18 December 2019
Ethics approval and consent to participate
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee (ethics committee of the Medical Faculty, University Hospital Cologne, University of Cologne [17–096]) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Informed consent was obtained from the legal guardian/parent of the index case.
: The authors declare that they have no competing interests.