2Piacquadio DJ, Larsen NE, Denlinger JL, et al. Hylan B gel (hylaform) as a soft tissue augmentation material [A]. Klein AW, Tissueaugmentation in clinical practice: procedmes and techniques [C]. NewYork: Marcel Dekker, 1998:269-291.
3Brandt KD, Block JA, Michalski JP, et al. Efficacy and safety of intra-articular sodium hyaluronate in knee osteoarthritis[ J ]. Orthovisc Study Group. Clin Orthop, 2001,385: 130-143
