Systemic disease can produce changes in the nails.Perhaps the best known example of this is koilonychia as a sequale of ......

先天性对半甲及家系调查韩继冉，杜可明（保健科）１临床资料１．１病例：患者男，２０岁，出生时指（趾）甲即呈白、棕红两色，无自觉症状。平素健康，无急慢性病史......

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