Received: 9 August 2019
Accepted: 27 February 2020
First Online: 12 March 2020
Ethics approval and consent to participate
: The study protocol was approved by the institutional review board of the Hospital District of Southwest Finland (Study number: ETMK:116/1802/2014). The National Institute for Health and Welfare (Finland) approved access to the registry data (study number 182/5.05.00/2015). Statistics Finland approved access to the data on the cause of death (study number TK-53-86-17).
: Not applicable.
: The authors declare that they have no competing interests.