KEY RESOURCES TABLE

REAGENT or RESOURCE	SOURCE	IDENTIFIER
Antibodies
PE-conjugated Anti-Human IgA	Miltenyi Biotec	clone IS11-8E10
Biological Samples
Human fecal samples from the OSCCAR cohort	(Sands et al., 2009)	N/A
Blood samples from the OSCCAR cohort	(Sands et al., 2009)	N/A
Critical Commercial Assays
Buhlmann Calprotectin ELISA kit	Alpco Immunoassays	30-CALPHU-E01
C-Reactive Protein	Prometheus Laboratories	N/A
Deposited Data
Raw data	This paper	16S rRNA gene sequence data (NCBI) BioProject: PRJNA674841
Oligonucleotides
16S rRNA Forward Primer for V4 region 515F: GTGCCAGCMGCCGCGGTAA	(Caporaso et al., 2012)	N/A
16S rRNA Reverse Primer for V4 region 806R: GGACTACHVGGGTWTCTAAT	(Caporaso et al., 2012)	N/A
Software and Algorithms
QIIME v1.9.1	(Caporaso et al., 2010)	http://qiime.org
R v3.6.3	(R Core Team, 2017)	https://www.r-project.org/
ggplot2	(Wickham, 2016)	N/A