assuming that the skin cancer risk from ingested arsenic in the american population would also be similar to the taiwan population , an american male would have a lifetime risk of developing skin cancer of 1.3 x 10 ( -3 ) ( 3.0 x 10 ( -3 ] if exposed to 1 microgram/kg/day for a 76-year lifespan ( median lifespan in the u.s. ) .
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the skin
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of