AERD	aspirin-exacerbated respiratory disease
ASV	amplicon sequence variant
bFGF	casic fibroblast growth factor
CMV	cytomegalovirus
CoNS	coagulase-negative staphylococci
COPD	chronic obstructive pulmonary disease
CRD	chronic respiratory disease
CRS	chronic rhinosinusitis
CRSsNP	chronic respiratory disease without nasal polyps
CRSwNP	chronic respiratory disease with nasal polyps
CT	computed tomography
EBV	Epstein–Barr virus
ECP	eosinophilic cationic protein
ECRSwNP	eosinophilic chronic respiratory disease with nasal polyps
ELISA	enzyme-linked immunosorbent assay
EPOS	European Position Paper on chronic rhinosinusitis
ESS	endoscopic sinus surgery
FESS	functional endoscopic sinus surgery
GM-CSF	granulocyte-macrophage colony-stimulating factor
GR	glucocorticoid receptor
GRADE	Grading of Recommendations, Assessment, Development, and Evaluations
HHV-6	human herpesvirus 6
HSV-1	herpes simplex virus type 1
IgE	immunoglobulin E
IGHG1	immunoglobulin heavy constant gamma 1
IGKC	ommunoglobulin kappa constant
IL	interleukin
ILC	innate lymphoid cells
ITS	internal transcribed spacer
LPS	lipopolysaccharide
MRSA	methicillin-resistant Staphylococcus aureus
NECRSwNP	non-eosinophilic chronic respiratory disease with nasal polyps
NOS	Newcastle–Ottawa Scale
NP	nasal polyp
NSAID-ERD	nonsteroidal anti-inflammatory drug-exacerbated respiratory disease
OTU	operational taxonomic unit
PCR	polymerase chain reaction
PICO	Population, Intervention, Control, and Outcome
PPAR	peroxisome proliferator-activated receptor
PRISMA	Preferred Reporting Items for Systematic Reviews and Meta-Analyses
PROSPERO	International Prospective Register of Systematic Reviews
QOL	quality of life
RIG-I	retinoic acid-inducible gene I
RoB	risk of bias
RoB 2	version 2 of the Cochrane risk-of-bias tool
rRNA	ribosomal ribonucleic acid
TAS2R38	taste receptor 2 member 38
TFF3	trefoil family factor peptide 3
Th2	T-helper type 2
TLR	Toll-like receptors
TNF	tumor necrosis factor