Text and Data Mining valid from 2019-05-22
Received: 8 January 2019
Accepted: 16 April 2019
First Online: 22 May 2019
Compliance with ethical standards
: The authors declare no conflicts 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. The Institutional Review Board approved our study (IRB license no. 28-119).
: Informed consent was obtained from all individual participants included in the study.