1. Aortic annuloplasty: The panacea of valve-preserving aortic replacement? 
Hans-Joachim Schäfers, MD 
The Journal of Thoracic and Cardiovascular Surgery 
Volume 153, Issue 5, Pages (May 2017)
DOI: /j.jtcvs
Copyright © 2017 The American Association for Thoracic Surgery Terms and Conditions

2. Hans-Joachim Schäfers, MD
The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /j.jtcvs )
Copyright © 2017 The American Association for Thoracic Surgery Terms and Conditions