Epigenetics, Cytogenetics, and Genetic Laboratories, Spanish National Cancer Centre (CNIO), Melchor Fernandez Almagro 3, 28029 Madrid, Spain; Department of Behavioral Science, University of Valencia, 46010 Valencia, Spain; Molecular Genetics Laboratory, Genetics Department, Son Dureta Hospital, 07014 Palma de Mallorca, Spain; Department of Clinical Sciences, University Hospital Malmö, Lund University, S-205 02 Malmö, Sweden; Steno Diabetes Center, 2820 Gentofte, Denmark; Twin Research and Genetic...