Kunin, A.
Sargheini, N.
Birkenbihl, C.
Moiseeva, N.
Fröhlich, Holger
Golubnitschaja, Olga
Funding for this research was provided by:
Rheinische Friedrich-Wilhelms-Universität Bonn
Article History
Received: 26 October 2020
Accepted: 30 October 2020
First Online: 12 November 2020
Compliance with ethical standards
: All individuals involved in the study were informed about the purposes of the study and consequently have signed their “consent of the individual under investigation”. All procedures involving human participants were performed with the permission of the Ethical Committee of the Voronezh N.N. Burdenko State Medical University, Voronezh, Russia, which are in accordance with the ethical standards of the institutional and/or national research committees and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: The authors declare that they have no competing interests.
: All individuals involved in investigations have been informed about the purposes of the study and have signed their consent for publishing the data.Individuals interviewed for creating the case reports have been informed about the purposes of the study and have signed their consent for publishing the data.