Piirtola, Maarit http://orcid.org/0000-0001-7270-6676
Kaprio, Jaakko
Silventoinen, Karri
Svedberg, Pia
Korhonen, Tellervo
Ropponen, Annina
Funding for this research was provided by:
Suomen Akatemia (213506, 129680, 265240, 263278, 266592)
Opetus- ja Kulttuuriministeriƶ
Article History
Received: 17 August 2016
Revised: 11 April 2017
Accepted: 26 April 2017
First Online: 9 May 2017
Compliance with ethical standards
:
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. The study protocol was approved by the Ethical Committee of the University of Helsinki, Department of Public Health. This present analysis did not involve any contact with the study participants and only used existing epidemiological data.
: This work was supported by the Academy of Finland Centre of Excellence in Complex Disease Genetics (Grants 213506 and 129680 to JK), the Academy of Finland (Grants 265240 and 263278 to JK) for data collection, and the Ministry for Education and Culture of Finland (to AR) for analyzing and reporting the results. KS was supported by the Academy of Finland (Grant 266592).
: JK reports personal fees from Pfizer unrelated to the submitted work. TK reports personal fees from Pfizer for consulting on nicotine dependence but unrelated to the submitted work. None of the other authors have anything to declare.