1Johansson T,Risto O,Knutsson A. Heterotopic ossification following internal fixation or arthroplasty for displaced femoral neck fractures:a prospective randomized study[J].International Orthopaedics,2001,(04):223-225.
2Stenvall M,Olofsson B,Lundstrm M. Inpatient falls and injuries in older patients treated for femoral neck fracture[J].Archives of Gerontology and Geriatrics,2006,(03):389-399.