The Raynaud's phenomenon reference article from the English Wikipedia on 24-Jul-2004
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Raynaud's phenomenon

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In medicine, Raynaud's phenomenon is discoloration of the fingers or toes due to emotion or cold in a characteristic pattern in time: white, blue and red. It is associated with a large number of diseases (mainly forms of vasculitis and hence belonging to rheumatology), but is idiopathic in most sufferers and is then called Raynaud's disease.

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