Endocrinology Unit 1, University Hospital of Pisa, Via Paradisa 2, 56124, Pisa, Italy. Department of Clinical and Experimental Medicine, Section of Endocrinology, University of Pisa, Via Paradisa 2, 56124, Pisa, Italy. Unit of Internal Medicine and Endocrinology, Laboratory for Endocrine Disruptors, IRCCS Maugeri, 27100, Pavia, Italy. Department of Internal Medicine and Therapeutics, University of Pavia, 27100, Pavia, Italy. Endocrinology Unit 1, University Hospital of Pisa, Via Paradisa 2, 56124, Pisa, Italy. mtonacchera@hotmail.com. Department of Clinical and Experimental Medicine, Section of Endocrinology, University of Pisa, Via Paradisa 2, 56124, Pisa, Italy. mtonacchera@hotmail.com.