Received: 1 August 2019
Accepted: 11 December 2019
First Online: 18 December 2019
Ethics approval and consent to participate
: The study was approved by the Ethics Committee of the Medical Faculty of the University of Leipzig. All procedures performed in studies were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments. Informed consent was obtained from all individual participants included in the study. All adult participants provided their written informed consent to participate in this study and for the data to be published. Also, written informed consent from the next of kin, caretakers, or guardians on behalf of the minors/children enrolled in the study was obtained.
: Not applicable.
: The authors declare that they have no competing interests.