Effects of a free school breakfast programme on children's attendance, academic achievement and short-term hunger: results from a stepped-wedge, cluster randomised controlled trial
Cliona Ni Mhurchu, Delvina Gorton, Maria Turley, Yannan Jiang, Jo Michie, Ralph Maddison, John Hattie
Journal of Epidemiology & Community Health Mar 2013, 67 (3) 257-264; DOI: 10.1136/jech-2012-201540