Text and Data Mining valid from 2019-07-30
Received: 9 July 2018
Accepted: 23 July 2019
First Online: 30 July 2019
Ethics approval and consent to participate
: The study was conducted according to the Declaration of Helsinki, the protocol was reviewed and approved by the institutional ethics committee.Approval number - 0070-16-SZMC.
: Not applicable
: The authors declare that they have no competing interests