Funding for this research was provided by:
Paracelsus Medizinische Privatuniversität
Text and Data Mining valid from 2018-03-08
Received: 28 September 2017
Accepted: 15 February 2018
First Online: 8 March 2018
Compliance with ethical standards
: 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 principles of the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards.