TY - JOUR AU - Mathie, AG AU - Benson, MK AU - Wilson, DJ DO - doi:10.1302/0301-620X.73B3.1670466 UR - https://doi.org/10.1302/0301-620X.73B3.1670466 TI - Lessons in the investigation of irritable hip: failure of ultrasound to detect haemarthrosis T2 - The Journal of Bone & Joint Surgery British Volume VL - 73-B IS - 3 PY - 1991 SP - 518 EP - 519 ER -