School-level factors associated with the sustainment of weekly physical activity scheduled in Australian elementary schools: an observational study. - Shoesmith, Adam; Hall, Alix; Wolfenden, Luke; Shelton, Rachel C.; Yoong, Serene; Crane, Melanie; Lane, Cassandra; McCarthy, Nicole; Lecathelinais, Christophe; Nathan, Nicole (BMC Public Health, 2022)