Received: 12 May 2017
Accepted: 25 February 2018
First Online: 14 March 2018
Ethics approval and consent to participate
: This study was approved by the Institutional Ethics Committee of the University Hospital Centre, Zagreb, Croatia. 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 Declaration of Helsinki and its later amendments or comparable ethical standards.
: Written, informed consent was obtained from all individual participants and/or their legal guardians included in the study.
: The authors declare that they have no competing interests.
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