Institution: | 1.Department of Orthopaedic Surgery, Thomas Jefferson University, 1015 Walnut Street, Philadelphia, PA 19107, USA;2.Department of Cancer Biology, Kimmel Cancer Center, Thomas Jefferson University, 233 South 10th Street, Philadelphia, PA 19107, USA;3.Department of Orthopaedic Surgery, Rothman Institute, 925 Chestnut Street, Philadelphia, PA 19107, USA;4.Biomet Spine, Biomet Inc., 100 Interpace Parkway, Parsippany, NJ 07054, USA |