Lung cancer is one of the malignant tumors with the highest growth rate of morbidity and mortality and the greatest threat to human health and life.Intestinal diseases such as ulcerative colitis,bowel cancer,gastrointestinal bleeding,irritable bowel syndrome and intestinal obstruction also occur frequently as people's living pressure increases.Traditional methods of lung cancer detection are often expensive,inconvenient to detect and have some harm to the human body.The use of breath gas to detect human dis...
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