Välimäki, Juha http://orcid.org/0000-0003-0808-2250
Article History
Received: 19 September 2017
Accepted: 1 February 2018
First Online: 13 February 2018
Compliance with Ethical Standards
:
: The author declares that he has no conflict of interest.
: All procedures performed in studies involving human participants 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.
: The study was a purely retrospective analysis and did not require informed consent from the participants. All patient data were deidentified and kept confidential. No identifiable patient data were collected.