Funding for this research was provided by:
Slovenian Research Agency (P3-0314)
Received: 20 October 2019
Accepted: 16 December 2019
First Online: 26 December 2019
Ethics approval and consent to participate
: The study was approved by the Slovenian National medical ethics committee, approval number 159/07/13.All patients included in the study provided informed consent to participate.
: Not applicable.
: The authors declare that they have no competing interests.