1. The impact of smoking in primary spontaneous pneumothorax
Yeung-Leung Cheng, MD, PhD, Tsai-Wang Huang, MD, Chih-Kung Lin, MD, Shih-Chun Lee, MD, Ching Tzao, MD, PhD, Jen-Chih Chen, MD, Hung Chang, MD, PhD 
The Journal of Thoracic and Cardiovascular Surgery 
Volume 138, Issue 1, Pages (July 2009)
DOI: /j.jtcvs
Copyright © 2009 The American Association for Thoracic Surgery Terms and Conditions

2. Figure 1
CONSORT diagram indicating the selection of study patients. COPD, Chronic obstructive pulmonary disease.
The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /j.jtcvs )
Copyright © 2009 The American Association for Thoracic Surgery Terms and Conditions