Text and Data Mining valid from 2018-08-04
Received: 15 March 2018
Revised: 24 May 2018
Accepted: 12 July 2018
First Online: 4 August 2018
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: 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 individuals participants included in the study.