Primary Source #336:

Pinto-Almeida T, Caetano M, Alves R, Selores M. Cutaneous lesions and finger clubbing uncovering hypocomplementemic urticarial vasculitis and hepatitis C with mixed cryoglobulinemia. An Bras Dermatol. 2013;88(6):973-976. doi:10.1590/abd1806-4841.20132776

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