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R00: Abnormalities of heart beat
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R01: Cardiac murmurs and other cardiac sounds
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R02: Gangrene, not elsewhere classified
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R03: Abnormal blood-pressure reading, without diagnosis
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R04: Haemorrhage from respiratory passages
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R05: Cough
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R06: Abnormalities of breathing
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R07: Pain in throat and chest
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R09: Other symptoms and signs involving the circulatory and respiratory systems
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