RT Journal A1 Brannon, James K. T1 Influence of Acetabular Coverage on Hip Survival After Free Vascularized Fibular Grafting for Femoral Head Osteonecrosis JF The Journal of Bone & Joint Surgery JO The Journal of Bone & Joint Surgery YR 2007 FD February 1 VO 89 IS 2 SP 448 OP 449 DO UL http://dx.doi.org/ AB