IPF	Idiopathic Pulmonary Fibrosis
BAL	Bronchoalveolar Lavage
LLMI	Lipid-Laden Macrophage Index
GERD	Gastroesophageal Reflux Disease
CT	Computed Tomography
HRCT	High-Resolution Computed Tomography
PFT	Pulmonary Function Test
DLCO	Diffusing Capacity of the Lungs for Carbon Monoxide
6MWT	6-Minute Walk Test
ED	Esophageal Diameter
BMI	Body Mass Index
SD	Standard Deviation
NS	Non-smoker
S	Smoker
Ex-S	Ex-smoker