Funding for this research was provided by:
Text and Data Mining valid from 2020-01-14
Received: 8 November 2019
Accepted: 30 December 2019
First Online: 14 January 2020
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: No informed consent is required for this type of publication according to the Hungarian Healthcare act of 1997.
: The study was approved by the Regional Research Ethic Committee, Pécs (7393 – PTE 2018, September 15, 2018).