Petra Baji is a Senior Research Associate in health economics at the Musculoskeletal Research Unit (MRU), University of Bristol, where she is currently involved in two projects: 1) Versus Arthritis funded REDUCE Study, which addresses unwarranted variation in the delivery of hip fracture services in England and Wales (2019-2023), and 2) The SISMIC Study: A Randomised Controlled Trial of Scaffold InSertion and MIcrofracture Compared to Microfracture Alone for the Treatment of Chondral or Osteochondral Defects of the Knee.