Usage of plant food supplements across six European countries: findings from PlantLIBRA consumer survey - Garcia-Alvarez, A; Egan, B; de Klein, S; Dima, L; Maggi, F M; Isoniemi, M; Ribas-Berba, L; Raats, M M; Meissner, E M; Badea, M; Bruno, F; Salmenhaara, M; Milà-Villarroel, R; Knaze, V; Hodgkins, C; Marculescu, A; Uusitalo, L; Restani, P; Serra-Majem, L (PLoS One, 2014)