Validation of a food-frequency questionnaire for Flemish and Italian-native subjects in Belgium: The IMMIDIET study.

van Dongen, Mc; Lentjes, Ma; Wijckmans, Ne; Dirckx, C; Lemaître, D; Achten, W; Celis, M; Sieri, S; Arnout, J; Buntinx, F; Siani, A; Cappuccio, Fp; de Lorgeril, M; Iacoviello, Licia; Dagnelie PC European Collaborative Group of the IMMIDIET, Project