1. Environmental, Genetic and Nutritional Epidemiology Research Center (CREAGEN), Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy
2. Department of Epidemiology, Boston University School of Public Health, Boston, Massachusetts, USA
3. RTI Health Solutions, Research Triangle Park, North Carolina, USA
4. Department of Epidemiology, UCLA Fielding School of Public Health, Los Angeles, California, USA
5. Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
6. Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden