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. 2015 May;49(9):614–622. doi: 10.1136/bjsports-2015-094762

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Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions

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Cumulative frequency distribution curves for haemoglobin (left panel) and reticulocytes (right panel) in the in competition (red line) and out-of-competition (black line) samples.