1. Military Performance Division, United States Army Research Institute of Environmental Medicine, Natick, MA, USA
2. Army Health and Performance Research, Army Headquarters, Andover, UK
3. Division of Surgery and Interventional Science, University College London, London, UK
4. Neuromuscular Research Laboratory/Warrior Human Performance Research Center, Department of Sports Medicine and Nutrition, University of Pittsburgh, Pittsburgh, PN, USA
5. Norwich Medical School, University of East Anglia, Norwich, UK