Adolescents' perceptions of food healthiness and food intake patterns: results from the HELENA study - Santaliestra-Pasias, A. M.; Bel-Serrat, S.; Mouratidou, T.; Beghin, L.; Nagy, E.; Widhalm, K.; Patterson, E.; Gilbert, C.; Diaz, L. E.; Mistura, L.; Grammatikaki, E.; Gonzalez-Gross, M.; et al. (International Journal Of Obesity, 2011)