von Bonsdorff, Mikaela B.
von Bonsdorff, Monika E.
Haanpää, Maija
Salonen, Minna
Mikkola, Tuija M.
Kautiainen, Hannu
Eriksson, Johan G.
Funding for this research was provided by:
Academy of Finland
Article History
Received: 16 January 2018
Accepted: 9 February 2018
First Online: 17 February 2018
Compliance with ethical standards
:
: The authors declare that they have no competing interests.
: All procedures performed in studies involving human participants were in accordance with the ethical standards approved by the Ethics Committee of Epidemiology and Public Health of the Hospital District of Helsinki and Uusimaa and that of the National Public Health Institute, Helsinki and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
: Informed consent was not required for this register-based observational study, the participants were not contacted. A permission for obtaining register data on participants was given by the National Institute of Health and Welfare, Helsinki, Finland.