DDTs, Venus gallina, PCBs, Human health, European coasts, PAH, HCB, Marine contamination, HCHs, Tapes philippinarum, Clams, Environmental Pollutants - poisoning, Polychlorinated Biphenyls - analysis, Public Health, Polychlorinated Biphenyls - poisoning, Risk Assessment, Shellfish, Food Contamination, Europe, Humans, Polycyclic Aromatic Hydrocarbons - poisoni...