Funding for this research was provided by:
Deutsche Forschungsgemeinschaft (SE 581/22-1)
Dr. Werner Jackstädt-Stiftung
German-Israeli Foundation for Scientific Research and Development (I-37-414.11-2016)
Received: 23 July 2020
Accepted: 22 September 2020
First Online: 29 September 2020
Ethics approval and consent to participate
: From 2008 all patients gave informed consent, while for samples before 2008, the Ethic Commission in Erlangen waived the need for informed individual consent. The study is based on the approvals of the Ethic Commissions of the University Hospital Erlangen (No. 3755) and was conducted according to the principles expressed in the Declaration of Helsinki.
: All authors approved the final version of this paper.
: The authors declare that they have no competing interests.