Health promotion in primary and secondary schools in Denmark: time trends and associations with schools' and students' characteristics.
Nabe-Nielsen K, Krølner R, Macfarlana D, Mortensen LH, Jørgensen MB, Diderichsen F
BioMedical Central Public Health, 2015;15:93. doi: 10.1186/s12889-015-1440-z.