6MWD	Distance Walked in a 6 Min Walk Test
ASA	American Society of Anesthesiologists
COVID: COVID-19	Coronavirus-Induced Disease 2019
CRP	C-reactive Protein
CT	Computed Tomography
DBRCT	Double-blind Randomized Clinical Trials
DLCO	Diffusing Capacity of the Lungs for Carbon Monoxide
ECM	Extracellular Matrix
EQ-5D	EuroQol-5 Dimensions Questionnaire
FACIT-Dyspnea-10	Functional Assessment of Chronic Illness Therapy–Dyspnea Questionnaire–10 items
FEV1	Forced Expiratory Volume in 1 s
FGF	Fibroblast Growth Factor
FVC	Forced Vital Capacity
GAD-7	General Anxiety Disorder-7 score
GGO	Ground-Glass Opacity
HRV	Heart Rate Variability
ICD-10	10th revision of the International Statistical Classification of Diseases and Related Health Problems
ICU	Intensive Care Unit
IL-1	Interleukin 1
IL-1β	Interleukin 1β
IL-6	Interleukin 6
IL-8	Interleukin 8
IL-10	Interleukin 10
IL-13	Interleukin 13
IL-2R	Interleukin-2 Receptor
IPF	Idiopathic Pulmonary Fibrosis
KBILD	King’s Brief ILD Questionnaire
LPS	Lipopolysaccharide
mBDS	Modified Borg Dyspnea Scale
MC	Multicenter
MMF	Mycophenolate Mofetil
mMRC	Modified Medical Research Council
NALRP3	Cryopyrin
NF-KB	Nuclear Factor Kappa-Light-Chain-Enhancer of Activated B Cells
Non-RCT	Nonrandomized Controlled Trial
Non-RT	Nonrandomized Trial
OP	Organizing Pneumonia
PBMC	Peripheral Blood Mononuclear Cell
PCOP	Post-COVID-19 Organizing Pneumonia
PCPS	Post-COVID-19 Pulmonary Sequelae
PDGF	Platelet-Derived Growth Factor
PHQ-9	Patient Health Questionnaire-9
PIOP	Postinfection Organizing Pneumonia
QD	Once-a-Day
QOL-BREF	Quality of Life-BREF Score
RAND 36	Rand 36-item Health Survey
RCT	Randomized Controlled Trial
RHI	Reactive Hyperemia Index
ROS	Reactive Oxygen Species
RPE	Borg Rating of Perceived Exertion
RR	Risk Ratio
SARS	Severe Acute Respiratory Syndrome
SARS-CoV-2	Severe Acute Respiratory Syndrome Coronavirus 2
SBRCT	Single-blind Randomized Clinical Trials
SC	Single Center
SF-36	Thirty-Six-Item Short-Form Health Survey questionnaire
SGRQ	the St. George’s Respiratory Questionnaire scale
SpO2	Oxygen Saturation
TGF-β	Tumor Necrosis Factor Beta
TLC	Total Lung Capacity
TLCO	Transfer Capacity of the Lung
TNF-α	Tumor Necrosis Factor Alpha
VAS	Visual Analogue Scale
VEGF	Vascular Endothelial Growth Factor