Vicente Andreoli, Carlos Superomedial Portal (Ejnisman's Portal) and Modified "Chicken-Wing" Patient Position for Scapulothoracic Arthroscopy. [electronic resource] - Arthroscopy techniques Jan 2020 - e51-e55 p. digital Publication Type: Journal Article ISSN: 2212-6287 Standard No.: 10.1016/j.eats.2019.08.019 doi