Schwenk, Eric S Ultrasound-Guided Out-of-Plane vs. In-Plane Interscalene Catheters: A Randomized, Prospective Study. [electronic resource] - Anesthesiology and pain medicine Dec 2015 - e31111 p. digital Publication Type: Journal Article ISSN: 2228-7523 Standard No.: 10.5812/aapm.31111 doi