1. Hospital volume, mitral repair rates, and mortality in mitral valve surgery in the elderly: An analysis of US hospitals treating Medicare fee-for-service patients 
Christina M. Vassileva, MD, Christian McNeely, BS, John Spertus, MD, Stephen Markwell, MA, Stephen Hazelrigg, MD 
The Journal of Thoracic and Cardiovascular Surgery 
Volume 149, Issue 3, Pages e1 (March 2015)
DOI: /j.jtcvs
Copyright © 2015 The American Association for Thoracic Surgery Terms and Conditions

2. Figure 1
Flowchart of patient selection. ICD-9-CM, International Classification of Diseases, Ninth Edition, Clinical Modification; ESRD, end-stage renal disease; VAD, ventricular assist device.
The Journal of Thoracic and Cardiovascular Surgery  , e1DOI: ( /j.jtcvs )
Copyright © 2015 The American Association for Thoracic Surgery Terms and Conditions

3. Odds ratios for adjusted operative mortality along with mitral valve repair rates.
The Journal of Thoracic and Cardiovascular Surgery  , e1DOI: ( /j.jtcvs )
Copyright © 2015 The American Association for Thoracic Surgery Terms and Conditions