Objective to understand the situation of secondary skin cancer of hyperkeratosis of skin spot caused by coal burning type of arsenic poisoning.
目的了解燃煤型砷中毒皮肤角化点继发皮肤癌变的情况。
Objective to understand the situation of secondary skin cancer of hyperkeratosis of skin spot caused by coal burning type of arsenic poisoning.
目的了解燃煤型砷中毒皮肤角化点继发皮肤癌变的情况。
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