9Reginster JY. The prevalence and burden of arthritis [ J ]. Rheumatolo- gy, 2002, 41: 3-6.
10Buckwalter JA, Saltzman C, Brown T. The impact of osteoarthfitis : im- plications for research [ J ]. Clinical Orthopaedics & Related Research, 2004, 427: $6-S15.