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R00 - Abnormalities of heart beat
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R01 - Cardiac murmurs and other cardiac sounds
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R03 - Abnormal blood-pressure reading, without diagnosis
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R04 - Hemorrhage 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 system
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