Article History
Received: 7 June 2018
Accepted: 25 October 2018
First Online: 1 November 2018
Compliance with ethical standards
:
: The authors declare not conflicts of interest.
: All procedures performed in previously published studies by the authors involving human participants used in this data analysis 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 previously published studies used in this analysis (Nieman et al. CitationRef removed, CitationRef removed, CitationRef removed).