Funding for this research was provided by:
Juho Vainion Säätiö (201910383)
Opetus- ja Kulttuuriministeriö
Received: 11 June 2019
Accepted: 2 October 2019
First Online: 21 October 2019
Ethics approval and consent to participate
: The study was carried out in conformance with the declaration of Helsinki. It followed the legislation, decrees and ethical principles concerning medical research on humans in Finland. The Data Protection Ombudsman of Finland has reviewed the NFBC program, the ethical committee of Northern Ostrobothnia Hospital District has approved the program and the permission from the Finnish Ministry of Social Affairs and Health was obtained for the use of register data and patient records. All participants have been willing to participate in the study and have granted permission for the use of their information in unidentifiable format for the purposes of scientific research.
: Not applicable.
: The authors declare that they have no competing interests.