1. Environmental Medicine and Sciences Division, Institute of Naval Medicine, Crescent Road, Alverstoke, Hampshire, UK
2. Regional Medical Centre, RAF Halton, Aylesbury, Bucks, UK
3. Nutritional Sciences Department, Faculty of Health and Medical Sciences, University of Surrey, Guilford, Surrey, UK
4. Arthritis Research UK Sports, Exercise and Osteoarthritis Centre, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Windmill Road, Headington, Oxford, UK
5. MRC Lifecourse Epidemiology Unit, Southampton General Hospital, University of Southampton, Southampton UK
6. Sydney Medical School, Edward Ford Building A27, The University of Sydney, NSW, Australia