| http://www.w3.org/ns/prov#value | - Researchers are also studying how some viruses, such as Epstein-Barr, have been associated with a small percentage of stomach cancer cases,4 as well as the role of the Human Papillomavirus (HPV) in esophageal cancer tumors.2The main risk factors for esophageal cancer are obesity, heavy drinking and smoking.
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