TY - JOUR AU - Simpson, A. H. R. W. AU - Howie, C. R. AU - Norrie, J. DO - doi:10.1302/2046-3758.64.BJR-2017-0051 UR - https://doi.org/10.1302/2046-3758.64.BJR-2017-0051 TI - Surgical trial design – learning curve and surgeon volume T2 - Bone & Joint Research VL - 6 IS - 4 PY - 2017 SP - 194 EP - 195 ER -