Sæther, Nikolai Havn http://orcid.org/0000-0002-1770-1618
Skuja, Elina
Irmejs, Arvids
Maksimenko, Jelena
Miklasevics, Edvins
Purkalne, Gunta
Gardovskis, Janis
Article History
Received: 28 January 2018
Accepted: 13 April 2018
First Online: 27 April 2018
Ethics approval and consent to participate
: This retrospective evaluation was approved by the RSU Ethical committee (Nr.55/ 27.10.2016).
: Consent was obtained from all participants in this study.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.