Interposition Dermal Matrix Xenografts: A Successful Alternative to Traditional Treatment of Massive Rotator Cuff Tears. - Neumann, Julie A.; Zgonis, Miltiadis H.; Rickert, Kathleen D.; Bradley, Kendall E.; Boggess, Blake R.; Toth, Alison P.; Kremen, Thomas J. (American Journal of Sports Medicine, 2017)