- Correspondence to Dr Jamie Hugo Macdonald, Extremes Research Group, School of Sport, Health and Exercise Sciences, Bangor University, George Building, Bangor, Gwynedd LL57 2PZ, UK;
- Accepted 19 August 2011
- Published in print 1 September 2012.
- Published online 17 August 2012.
- Published first 29 September 2011.
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