Text and Data Mining valid from 2020-03-04
Received: 18 November 2019
Accepted: 20 February 2020
First Online: 4 March 2020
Ethics approval and consent to participate
: All procedures performed in the study were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Methods and patient consent form were approved in writing by Ethics committee for clinical research: P. Stradins Clinical University Hospital Development Society Ethics committee for clinical research (original name in Latvian: <i>P. Stradiņa Klīniskās universitātes slimnīcas Attīstības biedrības klīniskās izpētes ētikas komiteja</i>). Informed consent in writing was obtained from all individual participants included in the study.
: Not applicable.
: The authors declare that they have no competing interests.