1. Nair V. Oral bacteria and colorectal pathology. Ann Colorectal Res. 2021;9(2):47-50. https://doi.org/10.30476/ACRR.2021.91493.1105.

2. Coker OO, Nakatsu G, Dai RZ, Wu WKK, Wong SH, Ng SC, et al. Enteric fungal microbiota dysbiosis and ecological alterations in colorectal cancer. Gut. 2019;68(4):654-662. https://doi.org/10.1136/gutjnl-2018-317178.

3. Kaźmierczak-Siedlecka K, Dvořák A, Folwarski M, Daca A, Przewłócka K, Makarewicz W. Fungal gut microbiota dysbiosis and its role in colorectal, oral, and pancreatic carcinogenesis. Cancers (Basel). 2020;12(5):1326. https://doi.org/10.3390/cancers12051326.

4. Tubino PV, Sarmento BJ, dos Santos VM, Borges ER, da Silva LE, Lima Rde S. Synchronous oral paracoccidioidomycosis and esophageal carcinoma. Mycopathologia. 2012;174(2):157-161. https://doi.org/10.1007/s11046-012-9527-x.

5. Vallianou N, Kounatidis D, Christodoulatos GS, Panagopoulos F, Karampela I, Dalamaga M. Mycobiome and cancer: what is the evidence? Cancers (Basel). 2021;13(13):3149. https://doi.org/10.3390/cancers13133149.

6. Yeoh YK, Zuo T, Lui GC, Zhang F, Liu Q, Li AY, et al. Gut microbiota composition reflects disease severity and dysfunctional immune responses in patients with COVID-19. Gut. 2021 Apr;70(4):698-706. https://doi.org/10.1136/gutjnl-2020-323020.

7. Yuan X, Chang C, Chen X, Li K. Emerging trends and focus of human gastrointestinal microbiome research from 2010-2021: a visualized study. J Transl Med. 2021;19(1):327. https://doi.org/10.1186/s12967-021-03009-8.

8. Zhang J, Garrett S, Sun J. Gastrointestinal symptoms, pathophysiology, and treatment in COVID-19. Genes Dis. 2021;8(4):385-400. https://doi.org/10.1016/j.gendis.2020.08.013.

9. Zhang S, Kong C, Yang Y, Cai S, Li X, Cai G, et al. Human oral microbiome dysbiosis as a novel non-invasive biomarker in detection of colorectal cancer. Theranostics. 2020;10(25):11595-11606. https://doi.org/10.7150/thno.49515.

10. Zhang Y, Niu Q, Fan W, Huang F, He H. Oral microbiota and gastrointestinal cancer. Onco Targets Ther. 2019;12:4721-4728. https://doi.org/10.2147/OTT.S194153.