Researchers have found that eating more than five servings of yam, corn, carrots, onions or other similar vegetables a day can reduce the risk of pancreatic cancer  They surveyed 2230 respondents, including 532 patients with pancreatic cancer, then classified the agricultural products eaten by cancer patients and asked them about their other living habits, such as overall diet and smoking  Compare it with the living habits of the other 1701 people
It was found that people who ate at least five servings of vegetables a day were half as likely to develop pancreatic cancer as those who ate less than two servings of vegetables a day
Is what the interviewees said in the survey true.