Task: Answer Verification
Input (English): Question: Does mixing bone graft with OP-1 improve cup or stem fixation in revision surgery of the hip : 5-year follow-up of 10 acetabular and 11 femoral study cases and 40 control cases?
Answer: The sample size and study design in our evaluation did not allow any firm conclusions. Absence of any trend to improved fixation and early revisions in the study group prompted us to stop recruitment to this study.
Output (English): no