Article History
Received: 27 April 2018
Accepted: 5 October 2018
First Online: 10 November 2018
Ethics approval and consent to participate
: This study was approved by the National Medical Ethics Committee (Republic of Slovenia National Medical Ethics Committee, Number 169/07/11) on July 12, 2011. All of the participants gave their written, informed consent to participate in the study.
: Not applicable.
: The authors declare that they have no competing interests.
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