1. Research Center in Environmental, Nutritional and Genetic Epidemiology (CREAGEN), Department of Biomedical, Metabolic and Neural Sciences; University of Modena and Reggio Emilia; Modena Italy
2. Department of Pharmacy, School of Medicine and Surgery; University of Naples 'Federico II'; Naples Italy
3. Norwich Medical School; University of East Anglia; Norwich UK
4. Department of Internal Medicine, Division of Oncology and Hematology; Paracelsus Medical University, Klinikum Nuremberg; Nuremberg Germany
5. Department of Epidemiology; Boston University School of Public Health; Boston USA