Spiegel David A, Gosselin Richard A, Coughlin R Richard, Joshipura Manjul, Browner Bruce D, Dormans John P
Division of Orthopaedic Surgery, Children's Hospital of Philadelphia, 2nd Floor Wood Building, 34th Street and Civic Center Boulevard, Philadelphia, PA 19104, USA.
J Bone Joint Surg Am. 2008 Apr;90(4):915-23. doi: 10.2106/JBJS.G.00637.