CAC	coronary artery calcification
CBT	cognitive-behaviour therapy
CEA	cost-effectiveness analysis
COPD	chronic obstructive pulmonary disease
ER	efficiency ratio
GOLD	Diagnosis, Management, and Prevention of COPD
ICER	incremental cost-effectiveness ratio
LCS	lung-cancer screening
LDCT	low-dose computed tomography
LY	life year
MSC	microRNA signature cluster
QALY	quality-adjusted life years
SBRT	stereotactic body radiotherapy
SC	smoking cessation
SES	socioeconomic status
COSMOS	Continuous Observation of Smoking Subjects study
I-ELCAP	Early Lung Cancer Action Program
LHLP	Liverpool Healthy Lung Program
LLP	Liverpool Lung Project
NELSON	European Randomised Controlled Trial (Dutch acronym)
NLST	National Lung Screening Trial
PLCO	Prostate, Lung, Colorectal, and Ovarian Cancer Screening Trial
UKLS	UK Lung Screen
USPSTF	United States Preventive Services Task Force