AUC	Area under the curve
ATS/ERS	American Thoracic Society/European Respiratory Society
BASE	Base model
BMP	Bronchial mucus plugs
BO	Bronchiolitis obliterans
CAP	Community-acquired pneumonia
CI	Confidence interval
CRP	C-reactive protein
CT	Computed tomography
DCA	Decision curve analysis
ESR	Erythrocyte sedimentation rate
EXT	Extended model
FEF25%	Forced expiratory flow at 25% of forced vital capacity
FEF50%	Forced expiratory flow at 50% of forced vital capacity
FEF75%	Forced expiratory flow at 75% of forced vital capacity
FEV1	Forced expiratory volume in 1 s
FVC	Forced vital capacity
IFN	Interferon
IL	Interleukin
IQR	Interquartile range
LASSO	Least absolute shrinkage and selection operator
LDH	Lactate dehydrogenase
MAE	Mean absolute error
MICE	Multiple imputation by chained equations
MMEF	Maximal mid-expiratory flow
MPP	Mycoplasma pneumoniae pneumonia
M. pneumoniae	Mycoplasma pneumoniae
NK	Natural killer
OR	Odds ratio
PA	Particle agglutination
PB	Plastic bronchitis
PCR	Polymerase chain reaction
PIBO	Post-infectious bronchiolitis obliterans
ROC	Receiver operating characteristic
RMPP	Refractory Mycoplasma pneumoniae pneumonia
SAD	Small airway dysfunction
sIL-2R	Soluble interleukin-2 receptor
SMPP	Severe Mycoplasma pneumoniae pneumonia
Treg	Regulatory T cells
Th	T-helper