Vikstedt, Tiina
Arffman, Martti
Heliövaara-Peippo, Satu
Manderbacka, Kristiina
Reissell, Eeva
Keskimäki, Ilmo
Article History
Received: 9 April 2021
Accepted: 9 June 2021
First Online: 14 June 2021
Declarations
:
: The study protocol was approved by the Research Ethics Committee of the Finnish Institute for Health and Welfare (decision number THL/442/6.02.01/2018 §787). Permission to use the above described register data was obtained from the Finnish Institute for Health and Welfare and Statistics Finland.
: Not applicable as the manuscript does not contain any individual person’s data in any form.
: The authors declare no competing interests that could have biased the work.