1. Primum non nocere when the treatment is worse than the disease
James Jaggers, MD 
The Journal of Thoracic and Cardiovascular Surgery 
Volume 155, Issue 4, Pages (April 2018)
DOI: /j.jtcvs
Copyright © 2018 The American Association for Thoracic Surgery Terms and Conditions

2. Greek physician Hippocrates (460 bc to 370 bc), author of the oath.
The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /j.jtcvs )
Copyright © 2018 The American Association for Thoracic Surgery Terms and Conditions