Understanding school food systems to support the development and implementation of food based policies and interventions. - Bryant, Maria; Burton, Wendy; O'Kane, Niamh; Woodside, Jayne V.; Ahern, Sara; Garnett, Phillip; Spence, Suzanne; Sharif, Amir; Rutter, Harry; Baker, Tim; Evans, Charlotte E. L. (International Journal of Behavioral Nutrition & Physical Activity, 2023)