Kotkansalo, Anna http://orcid.org/0000-0002-3182-7786
Malmivaara, Antti
Korajoki, Merja
Korhonen, Katariina
Leinonen, Ville
Funding for this research was provided by:
Hospital District of Helsinki and Uusimaa / Orton Research Foundation (9310/403)
Finnish Medical Foundation (Eka-apuraha)
Article History
Received: 20 May 2019
Accepted: 25 July 2019
First Online: 10 August 2019
Compliance with ethical standards
:
: The authors declare that they have no conflicts of interest.
: The creation of the PERFECT Spine database was approved by the Ethics Committee of the National Institute for Health and Welfare (THL 496/6.02.00/2011). As the data was acquired from the administrative registries anonymized, and the patients were not contacted; informed consent is not required.