1. Endothelin blockade potentiates endothelial protective effects of ace inhibitors in saphenous veins 
Lawrence Ko, BS, Andrew Maitland, MD, Paul W.M Fedak, MD, Aaron S Dumont, MD, Mitesh Badiwala, BS, Fina Lovren, PhD, Christopher R Triggle, PhD, Todd J Anderson, MD, Vivek Rao, MD, PhD, Subodh Verma, MD, PhD 
The Annals of Thoracic Surgery 
Volume 73, Issue 4, Pages (April 2002)
DOI: /S (01)

2. Fig 1
Endothelium-dependent vascular relaxation to acetylcholine in saphenous veins from untreated and angiotensin converting enzyme inhibitor-treated groups. Percentage maximum relaxatory responses to acetylcholine (%Emax) in vessel rings precontracted with the concentration that evoked 75% of maximum contraction to phenylephrine are depicted and compared between groups. ∗p < 0.05, different from all other groups; ∗∗p < 0.05, different from all other groups. (ACh = acetylcholine.)
The Annals of Thoracic Surgery  , DOI: ( /S (01) )