Effectiveness and cost-effectiveness of the GoActive intervention to increase physical activity among UK adolescents: a cluster randomised controlled trial

Kirsten Corder, Stephen J. Sharp, Stephanie Jong, Campbell Foubister, Helen Elizabeth Brown, Emma K. Wells, Sofie M. Armitage, Caroline H.D. Croxson, Anna Vignoles, Paul O. Wilkinson, Ed Wilson, Esther M. F. van Sluijs