Funding for this research was provided by:
Austrian Science Fund (P30144, KLI521-B31)
Text and Data Mining valid from 2019-04-15
Received: 11 January 2019
Accepted: 8 April 2019
First Online: 15 April 2019
Compliance with ethical standards
: The authors declare no competing interests.
: Ethical approval was granted by the ethics committee of the Medical University of Graz (protocol numbers EK 28-492 ex 15/16 and EK 17-291 ex 05/06. All procedures performed in studies involving human participants 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 or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.