Linna, Hannamari
Suija, Kadri
Rajala, Ulla
Herzig, Karl-Heinz
Karhu, Toni
Jokelainen, Jari
Keinänen-Kiukaanniemi, Sirkka
Timonen, Markku
Funding for this research was provided by:
The work was done in the Center for Life Course Epidemiology, University of Oulu, Finland