The effect of a multi-component school-based social network intervention on children's body mass index: a four-arm intervention study. - Polman, Marloes A. A.; Beckers, Desi; Burk, William J.; Smit, Crystal R.; Buijzen, Moniek; Vink, Jacqueline M.; van den Broek, Nina; Larsen, Junilla K. (Psychology & Health, 2024)