[1
]
Doncaster and Bassetlaw Teaching Hospitals NHS Foundation Trust, Doncaster, UK.
[2
]
University of Birmingham, Birmingham, UK.
[3
]
University College London, London, UK.
[4
]
Newcastle-upon-Tyne Hospitals NHS Foundation Trust, Newcastle-upon-Tyne, UK.
[5
]
Royal Blackburn Teaching Hospital, Blackburn, and University of Central Lancashire,
Preston, UK.
[6
]
University of Manchester, Manchester, UK.
[7
]
Betsi Cadwaladr University Health Board, Bangor, Gwynedd, UK.
[8
]
Sheffield Teaching Hospitals NHS Trust, Sheffield, UK.
[9
]
Royal National Hospital for Rheumatic Diseases NHS Trust, Bath, UK.
[10
]
University Hospital Southampton NHS Foundation Trust, Southampton, UK.
[11
]
Guy's Hospital, London, UK.
[12
]
King's College London, London, UK.
[13
]
MRC Biostatistics Unit, Cambridge, UK.