Article History
Received: 22 October 2018
Accepted: 16 April 2019
First Online: 24 April 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: All procedures performed in the study were in accordance with the ethical standards of the Slovenian National Medical Ethics Committee, which approved the protocols in this study (Approval No. 41/12/12), 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 study.