4Islam A, Glomski C, Hendenson ES. Endothelial cells and hema- topoiesis : a light microscopic study of tetal, normal, and pathologic human bone marrow in plastic embedded sections[ J]. Anat Res, 2012,233 ( 3 ) :440-452.
5Mont MA, Hungerford DS. Non-traumatic avascular necrosis of the femoral head [ J ]. J Bone Joint Surg Am ,2013,77 (3) :459-474.
6Kim M, Ahn JH, Kang HS,et al. Estimation of the extent of osteo- necrosis of the femoral head using MRI [ J ]. Bone Joint Surg, 2011,80B(6) :954-958.
