Funding for this research was provided by:
Oesterreichische Nationalbank (16377)
Text and Data Mining valid from 2020-02-26
Received: 3 December 2019
Accepted: 13 February 2020
First Online: 26 February 2020
Ethics approval and consent to participate
: The study protocol was approved by the ethics committee of Burgenland and by the ethics committee of the Medical University of Vienna. We hereby confirm that all methods were performed according to the guidelines and regulations approved by the local ethics committee and to the guidelines of the Declaration of Helsinki. Written informed consent was obtained from each participant in the study.
: Not applicable.
: The authors declare no competing interests.