Department of Experimental and Clinical Medicine;
University of Florence;
Florence 50134;
Italy;
Giotto Biotech Srl;
and CERM(University of Florence);
Florence 50019;
Italy;
SOD of Interdisciplinary Internal Medicine;
Azienda Ospedaliera Universitaria Careggi;
Florence 50134;
Italy;
Consorzio Interuniversitario Risonanze Magnetiche di Metalloproteine;
Florence 50019;
Italy;
Metabolomics; Nuclear magnetic resonance spectroscopy; Pancreatic cancer; Gastric cancer; Colorectal cancer; Biological fluids;