Levola, Jonna M. http://orcid.org/0000-0002-4707-1485
Sailas, Eila S.
Säämänen, Timo S.
Turunen, Leena M.
Thomson, Annika C.
Funding for this research was provided by:
Hyvinkää Hospital District
Article History
Received: 11 July 2019
Accepted: 7 November 2019
First Online: 21 November 2019
Ethics approval and consent to participate
: The study was approved by the ethical committee of the Hospital District of Helsinki and Uusimaa. According to the Finnish Office of the Data Protection Ombudsman, register data can be used without consent of the participant for reasons such as the age and large amount of data, as is the case in this study, thus informed consent was not obtained. The ethical committee of the Hospital District of Helsinki and Uusimaa approved this procedure.
: Not applicable.
: The authors declare that they have no competing interests.