The effects on student health of interventions modifying the school environment: systematic review
C Bonell, H Wells, A Harden, F Jamal, A Fletcher, J Thomas, R Campbell, M Petticrew, M Whitehead, S Murphy, L Moore
J Epidemiol Community Health Aug 2013, 67 (8) 677-681; DOI: 10.1136/jech-2012-202247