Drupal-Bibcite0<style face="normal" font="default" size="100%">App based education programme to reduce salt intake (AppSalt) in schoolchildren and their families in China: Parallel, cluster randomised controlled trial</style><style face="normal" font="default" size="100%">App based education programme to reduce salt intake (AppSalt) in schoolchildren and their families in China: Parallel, cluster randomised controlled trial</style>