1. Screening Heroin Smokers Attending Community Drug Services for COPD
Hassan Burhan, MD, Ryan Young, MD, Tara Byrne, BSc, Robert Peat, BSc, Jennifer Furlong, MSc, Susan Renwick, MPH, Tristan Elkin, MD, Sandra Oelbaum, MD, Paul P. Walker, MD 
CHEST 
Volume 155, Issue 2, Pages (February 2019)
DOI: /j.chest
Copyright © 2018 American College of Chest Physicians Terms and Conditions

2. Figure 1
Consolidated Standards of Reporting Trials diagram detailing study flow and diagnosis. CCG = Clinical Commissioning Group; GP = general practitioner.
CHEST  , DOI: ( /j.chest )
Copyright © 2018 American College of Chest Physicians Terms and Conditions