1. The lord of the rings 
Antonio Miceli, MD, PhD 
The Journal of Thoracic and Cardiovascular Surgery 
Volume 154, Issue 6, Pages (December 2017)
DOI: /j.jtcvs
Copyright © 2017 The American Association for Thoracic Surgery Terms and Conditions

2. One Ring from The Lord of the Rings by J. R. R. Tolkien.
The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /j.jtcvs )
Copyright © 2017 The American Association for Thoracic Surgery Terms and Conditions