1. Lung volume reduction surgery since the National Emphysema Treatment Trial: Study of Society of Thoracic Surgeons Database 
Marquita R. Decker, MD, MPH, Glen E. Leverson, PhD, Wassim Abi Jaoude, MD, James D. Maloney, MD 
The Journal of Thoracic and Cardiovascular Surgery 
Volume 148, Issue 6, Pages e1 (December 2014)
DOI: /j.jtcvs
Copyright © 2014 The American Association for Thoracic Surgery Terms and Conditions

2. Figure 1
Yearly annual volume of LVRS reported in the STS Database from January 2003 to December 2010; 2011 volume is not shown, because yearly data were incomplete at the time of this study. LVRS, Lung volume reduction surgery.
The Journal of Thoracic and Cardiovascular Surgery  , e1DOI: ( /j.jtcvs )
Copyright © 2014 The American Association for Thoracic Surgery Terms and Conditions