Division of Pediatrics, Department of Health Sciences, University of Piemonte Orientale, Italy. Department of Agricultural and Food Sciences, University of Bologna, Italy. Department of Biotechnology, University of Verona, Italy. Department of Health Sciences, University of Piemonte Orientale, Italy; SCDU Endocrinology, Department of Translational Medicine, University of Piemonte Orientale, Italy. SCDU Endocrinology, Department of Translational Medicine, University of Piemonte Orientale, Italy. Department of Health Sciences, University of Piemonte Orientale, Italy. Clinical Biochemistry, Department of Health Sciences, University of Piemonte Orientale, Novara, Italy. Probiotical Research Srl, Novara, Italy. Department of Biotechnology, University of Verona, Italy. Electronic address: nicola.vitulo@univr.it. Division of Pediatrics, Department of Health Sciences, University of Piemonte Orientale, Italy; Department of Health Sciences, University of Piemonte Orientale, Italy; SCDU Endocrinology, Department of Translational Medicine, University of Piemonte Orientale, Italy. Electronic address: flavia.prodam@med.uniupo.it.