参考文献:
[1]https://www.helsinki.fi/en/news/health-news/the-finnish-covid-dogs-nose-knows
[2]Canine olfactory detection of malignant melanoma.doi: 10.1136/bcr-2013-008566
[3]A non-invasive tool for detecting cervical cancer odor by trained scent dogs.doi: 10.1186/s12885-016-2996-4
[4]https://www.owlstonemedical.com/science-technology/breath-biopsy/
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