Katz Jeffrey N, Wright James G, Losina Elena
Orthopedic and Arthritis Center for Outcome Research, Department of Orthopedic Surgery and Division of Rheumatology, Immunology and Allergy, Brigham and Women's Hospital, Boston, Massachusetts 02115, USA.
J Bone Joint Surg Am. 2011 Apr 6;93(7):e30. doi: 10.2106/JBJS.J.01039.