9[1]Zuckerman J D,Skovron M L,Koval KJ,et al.Postoperative complications and mortality associated with operative delay in older patients who have fracture of the hip.J.Bone Joint Surg(Am).1995,77:1551
10[2]Horowitz B G.Retrospective analysis of hip fractures.Surg Gynecol Obstet,1966,123:565