1. National Institute for Health Research Surgical Reconstruction and Microbiology Research Center, Queen Elizabeth Hospital, Birmingham, United Kingdom.
2. Department of Medical Statistics, University of Birmingham, Birmingham, United Kingdom.
3. Surgical Reconstruction and Microbiology Center, Queen Elizabeth Hospital, Birmingham, United Kingdom.
4. Department of Neurosurgical Trauma, Queen Elizabeth Hospital, Birmingham, United Kingdom.
5. Department of Endocrinology, Queen Elizabeth Hospital, Birmingham, United Kingdom.
6. Institute of Inflammation and Ageing, University of Birmingham, Birmingham, United Kingdom.