People younger than 30 who use a tanning bed 10 times a year have eight times the risk of developing malignant melanoma.
年龄小于30岁的人一年晒日光浴10次，会使恶性黑色素瘤发病风险增加七倍。
People younger than 30 who use a tanning bed 10 times a year have eight times the risk of developing malignant melanoma.
年龄小于30岁的人一年晒日光浴10次，会使恶性黑色素瘤发病风险增加七倍。
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