Cancer Epidemiol Biomark and Prevention. 2016. A Comprehensive Meta-analysis of Case–Control Association Studies to Evaluate Polymorphisms Associated with the Risk of Differentiated Thyroid Carcinoma Gisella Figlioli 1,2, Rossella Elisei 3, Cristina Romei 3, Ombretta Melaiu,Monica Cipollini 2, Franco Bambi 4, Bowang Chen 1, Aleksandra Kohler, Alfonso Cristaudo 3, Kari Hemminki 1,6, Federica Gemignani, Asta Forsti 1,6, and Stefano Landi 2 1,5 Molecular Genetic Epidemiology, German Cancer Research Center (DKFZ), Heidelberg, Germany. 2 Department of Biology, University of Pisa, Pisa, Italy. 3 Department of Endocrinology and Metabolism, Uni- versity of Pisa, Pisa, Italy. 4 Blood Centre, Azienda Ospedaliero Universitaria A. Meyer, Firenze, Italy. 5 II Medizinische Klinik, Gastrologie,Onkologie und Palliativmedizin, St. Agnes-Hospital Bocholt, Bocholt,Germany. 6 Center for Primary Health Care Research, Clinical ResearchCenter, Lund University, Malmoe, Sweden. Note: Supplementary data for this article are available at Cancer Epidemiology,Biomarkers & Prevention Online (http://cebp.aacrjournals.org/). F. Gemignani, A. F€orsti, and S. Landi contributed equally to this article. Corresponding Authors: Stefano Landi, Department of Biology, University of Pisa, Via Derna 1, 56126 Pisa, Italy. Phone: 39-0502211529; Fax: 39-0502211527; E-mail: stefano.landi@unipi.it; and Asta Forsti, Division of Molecular Genetic Epidemiology, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 580, 69120 Heidelberg, Germany. Phone: 49-6221421803; Fax: 49-6221421810; E-mail: a.foersti@dkfz-heidelberg.de