Development of national physical activity recommendations in 18 EU member states: a comparison of methodologies and the use of evidence - Tcymbal, Antonina; Gelius, Peter; Abu-Omar, Karim; Foster, Charlie; Whiting, Stephen; Mendes, Romeu; Titze, Sylvia; Dorner, Thomas Ernst; Halbwachs, Christian; Duclos, Martine; Toussaint, Jean-Francois; Wendel-Vos, Wanda; et al. (Friedrich-Alexander-Universität Erlangen-Nürnberg, 2021)