Content of Toxic Elements (Arsenic, Cadmium, Mercury, Lead) in Eggs from an Ethically Managed Laying Hen Farm oleh Alessandro Guerrini, Paola Roncada, Khaled Mefleh Al-Qudah, Gloria Isani, Fausto Pacicco, Mariantonietta Peloso, Luca Sardi, Doriana Eurosia Angela Tedesco, Gianluca Antonio Romeo, Elisabetta Caprai