1 Clinical Exercise and Respiratory Physiology Research Group, Carnegie School of Sport, Leeds Beckett University, Leeds, UK o.price@leedsbeckett.ac.uk.
2 Leeds Institute of Medical Research at St. James's, University of Leeds, Leeds, UK.
3 National Center for Catastrophic Sport Injury Research in the Dept of Exercise and Sport Science, University of North Carolina, Chapel Hill, NC, USA.
4 Dept of Family Medicine, Sports Medicine Section, University of Washington, Seattle, WA, USA.
5 Dept of Respiratory Medicine, Royal Brompton Hospital, London, UK.
6 Institute of Sport, Exercise and Health (ISEH), University College London (UCL), London, UK.