Effect of nationwide school policy on device-measured physical activity in Danish children and adolescents: a natural experiment
Summary Background A new Danish school policy with a requirement for 45 min physical activity daily
Summary Background A new Danish school policy with a requirement for 45 min physical activity daily
Chawanpaiboon, S. et al. Global, regional, and national estimates of levels of preterm birth in
Ortega, F. B., Ruiz, J. R., Castillo, M. J. & Sjöström, M. Physical fitness in