Changes in physical activity behavior and the development of body mass index during the last 30 years in Norway.
Scand J Med Sci Sports. 2008 Jun;18(3):309-17. doi: 10.1111/j.1600-0838.2007.00645.x. Epub 2007 Jul 23.
Scand J Med Sci Sports. 2008.
PMID: 17645730