1. Commentary: Hold 'em or fold 'em
John Calhoon, MD 
The Journal of Thoracic and Cardiovascular Surgery 
Volume 157, Issue 5, (May 2019)
DOI: /j.jtcvs
Copyright © 2018 The American Association for Thoracic Surgery Terms and Conditions

2. Old cowboy playing poker facing the same challenges as thoracic surgery.
The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /j.jtcvs )
Copyright © 2018 The American Association for Thoracic Surgery Terms and Conditions