RT Journal A1 Stiehl, James Bowen T1 Early Cup Instability with RSA Predicts Long-Term Aseptic LooseningCommentary on an article by Marc J. Nieuwenhuijse, BSc, MD, et al.: “Good Diagnostic Performance of Early Migration as a Predictor of Late Aseptic Loosening of Acetabular Cups. Results from Ten Years of Follow-up with Roentgen Stereophotogrammetric Analysis (RSA)” JF The Journal of Bone & Joint Surgery JO The Journal of Bone & Joint Surgery YR 2012 FD May 16 VO 94 IS 10 SP e70 1 OP 2 DO 10.2106/JBJS.L.00080 UL http://dx.doi.org/10.2106/JBJS.L.00080 AB