Pyykönen, Mikko
Linna, Miika
Tykkyläinen, Markku
Delmelle, Eric
Laatikainen, Tiina
Article History
Received: 17 March 2021
Accepted: 1 October 2021
First Online: 3 December 2021
Declarations
:
: Use of the data in this research was approved by the Ethics Committee of the North Savo Hospital District. The approval for data use was achieved from joint municipal authority for North Karelia social and health services administering the patient registers. The data was anonymised before its use.The Finnish legislation do not require informed consent for register-based research, as the study is solely based on registers (involving no contact with the study subjects) and the study is considered to be of public health importance. The data used in this study was anonymised before its use.
: Not applicable.
: Pyykönen, M. Linna, M. Tykkyläinen, M. Delmelle, E. and T. Laatikainen declare no competing interests.