16S rRNA sequencing analysis of the oral and fecal microbiota in colorectal cancer positives versus colorectal cancer negatives in Iranian population.

"Declarations Ethics approval and consent to participate.The case–control study was approved by the Clinical Research Ethics Committee of the Shahid Beheshti University of Medical Sciences and the Ethics Committee of Taleghani Hospital, Tehran, Iran (IR.SBMU.RIGLD.REC.1398.039). Consent for publicationInformed consent was obtained in all cases. Competing interestsThe authors declare that there are no competing interests. Competing interests The authors declare that there are no competing interests."

"Funding This research was supported by Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran under Grant [RIGLD1065]. Also, the16S rRNA sequencing part was supported by the UNISS FAR fondi ricercar 2021, 2022 and Fondazione di Sardegna 2017 to L.A.S. Grant from the Regione Autonoma della Sardegna, legge regionale 12 dicembre 2022, n. 22 to L.A.S."