Öman, Olli http://orcid.org/0000-0003-1375-7806
Mäkelä, Teemu
Salli, Eero
Savolainen, Sauli
Kangasniemi, Marko
Article History
Received: 7 June 2018
Accepted: 4 January 2019
First Online: 13 February 2019
Ethics approval and consent to participate
: Ethical committee approved this retrospective study, and patients’ informed consent was waived.
: Not applicable.
: The authors have no conflicts of interest to declare.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.