4Hofmann S, Mazieres B. Osteonecrosis:Natural course and conservative therapy. Orthop 2000;29:403-430
5State Council of the People's Republic of China. Administrative Regulations on Medical Institution. 1994-09-01. http://www.gov.cn/banshi/2005-08/01/content 19113.htm
6Qiu GX, Rong GW. Beijing: Peking Union Medical College Press 2002: 328
7Wang Y, ZhuSX, Zhao DW, et al. Zhonghua Guke Zazhi 1995;9(1): 567
9Gangji V, Hauzeur JE Treatment of osteonecrosis of the femoral head with implantation of autologous bone-marrow cells. Surgical technique . J Bone Joint Surg 2005; 87 Suppl 1 (Pt1): 106-112
10Mont MA, Hungerford DS, Maryland MB. Current concept review nontraumatic avascular necrosis of the femoral head. J Bone Joint Sury(Am) 1995;77(3):459-