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Paul Gunning inserts his own nasogastic tonometer at EBC
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Andre Vercueil prepares to have an arterial line inserted
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Roger McMorrow testing a new breathing circuit
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Dan Martin measuring microcirculation at Camp 2
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Sundeep Dhillon being tested at Everest Base Camp
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Chris Imray on an exercise bike at 7950m
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Comprehensively measuring oxygen delivery at EBC
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