TY - JOUR AU - Haddad, F. S. DO - doi:10.1302/0301-620X.101B7.BJJ-2019-0649 UR - https://doi.org/10.1302/0301-620X.101B7.BJJ-2019-0649 TI - Introducing The Hip Society and The Knee Society T2 - The Bone & Joint Journal VL - 101-B IS - 7 PY - 2019 SP - 757 EP - 757 ER -