1. Determination of the minimum number of lymph nodes to examine to maximize survival in patients with esophageal carcinoma: Data from the Surveillance Epidemiology and End Results database 
Shawn S. Groth, MD, Beth A. Virnig, PhD, Bryan A. Whitson, MD, Todd E. DeFor, MS, Zhong-ze Li, MS, Todd M. Tuttle, MD, Michael A. Maddaus, MD 
The Journal of Thoracic and Cardiovascular Surgery 
Volume 139, Issue 3, Pages (March 2010)
DOI: /j.jtcvs
Copyright © 2010 The American Association for Thoracic Surgery Terms and Conditions

2. Figure 1 Patients included in and excluded from study.
The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /j.jtcvs )
Copyright © 2010 The American Association for Thoracic Surgery Terms and Conditions

3. Figure 2
Overall (A) and cancer-specific (B) survival Kaplan-Meier curves for each lymph node (LN) group. Survival with 95% confidence interval (CI) at each year of follow-up for each LN group provided in the table below each graph.
The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /j.jtcvs )
Copyright © 2010 The American Association for Thoracic Surgery Terms and Conditions

4. Figure 3
Locally weighted least squares smooth of the percentage of patients with at least 1one positive lymph node as function of the number of lymph nodes examined.
The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /j.jtcvs )
Copyright © 2010 The American Association for Thoracic Surgery Terms and Conditions