TY - JOUR AU - Porter, RW AU - Park, W DO - doi:10.1302/0301-620X.64B3.7096402 UR - https://doi.org/10.1302/0301-620X.64B3.7096402 TI - Unilateral spondylolysis T2 - The Journal of Bone & Joint Surgery British Volume VL - 64-B IS - 3 PY - 1982 SP - 344 EP - 348 ER -