We cannot rely on the research of others. Why is breast cancer more common in the Po Valley than in the south of Italy, say in Sicily? There is a big difference in diet. In the Po Valley it is mainly dairy based whereas in Sicily it is based on olive oil. Could this have to do, for example, with the spreading over decades of various organophosphates, organochlorides and so on, which are taken up through the grass, eaten by cows and then consumed by us? We have got to be involved in research in these areas.