Bilateral or just left internal mammarian?

Bilateral or just left internal mammarian? Ann Thorac Surg. 2019 Jan 02;: Authors: Cakir H, Yurekli I, Eygi B, Asar K, Kestelli M PMID: 30610855 [PubMed - as supplied by publisher]
Source: The Annals of Thoracic Surgery - Category: Cardiovascular & Thoracic Surgery Authors: Tags: Ann Thorac Surg Source Type: research