Kannus, Pekka
Niemi, Seppo
Sievänen, Harri
Parkkari, Jari
Funding for this research was provided by:
Pirkanmaa Hospital District, Tampere, Finland (9V015)
Article History
Received: 7 December 2017
Accepted: 16 January 2018
First Online: 6 February 2018
Compliance with ethical standards
:
: On behalf of all authors, the corresponding author states that there is no conflict of interest.
: All procedures performed in studies involving human subjects were in accordance with ethical standards of the institutional and national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. This article does not contain any studies with animals performed by any of the authors.
: As a register-based blinded analysis, the study did not have identifiable individual participants, and thus, informed consent was not obtained.