TY - JOUR AU - Huhnstock, Stefan AU - Wiig, Ola AU - Merckoll, Else AU - Svenningsen, Svein AU - Terjesen, Terje DO - doi:10.1302/0301-620X.103B12.BJJ-2021-0515.R1 UR - https://doi.org/10.1302/0301-620X.103B12.BJJ-2021-0515.R1 TI - The modified Stulberg classification is a strong predictor of the radiological outcome 20 years after the diagnosis of Perthes’ disease T2 - The Bone & Joint Journal VL - 103-B IS - 12 PY - 2021 SP - 1815 EP - 1820 ER -