CRS	Chronic rhinosinusitis
eCRS	Eosinophilic chronic rhinosinusitis
Non-eCRS	Non-eosinophilic chronic rhinosinusitis
CRSwNP	Chronic rhinosinusitis with nasal polyps
CRSsNP	Chronic rhinosinusitis without nasal polyps
MBP	Major basic protein
ECP	Eosinophil cationic protein
EPX	Eosinophil peroxidase
EDN	Eosinophil-derived neurotoxin
EDGP	Eosinophil-derived granule protein
RNase 2	Ribonuclease 2 (EDN)
RNase 3	Ribonuclease 3 (ECP)
MPO	Myeloperoxidase
IgE	Immunoglobulin E
IL	Interleukin
IFN-γ	Interferon-gamma
TNF-α	Tumor necrosis factor-alpha
AERD	Aspirin-exacerbated respiratory disease
ASA	Aspirin sensitivity
CCAD	Central compartment atopic disease
AFRS	Allergic fungal rhinosinusitis
JESREC	Japanese Epidemiological Survey of Refractory Eosinophilic Chronic Rhinosinusitis
ESS	Endoscopic sinus surgery
FESS	Functional endoscopic sinus surgery
SNOT-22	22-item Sino-Nasal Outcome Test
SNOT-20	20-item Sino-Nasal Outcome Test
VAS	Visual analogue scale
TNSS	Total nasal symptom score
NPS	Nasal Polyp Score
CT	Computed tomography
hpf	High-power field
IHC	Immunohistochemistry
ELISA	Enzyme-linked immunosorbent assay
qRT-PCR	Quantitative reverse transcription polymerase chain reaction
AUC	Area under the curve
OR	Odds ratio
HR	Hazard ratio
CI	Confidence interval
NPV	Negative predictive value
PPV	Positive predictive value
LTE4	Leukotriene E4
PGD2	Prostaglandin D2
15(S)-HETE	15(S)-hydroxyeicosatetraenoic acid
PRISMA	Preferred Reporting Items for Systematic Reviews and Meta-Analyses
PROSPERO	International Prospective Register of Systematic Reviews
NOS	Newcastle-Ottawa Scale
GRADE	Grading of Recommendations Assessment, Development and Evaluation
RCT	Randomized controlled trial