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had the highest risk of bladder cancer in men and tobacco workers in women, and
the low-risk categories were the same ones as for lung cancer. All this can be
accounted for by smoking. The second-highest SIRs were among chimney sweeps and
hairdressers. Chimney sweeps are exposed to carcinogens such as polycyclic
aromatic hydrocarbons from the chimney soot, and hairdressers' work environment
is also rich in chemical agents. Exposure to the known hepatocarcinogens, the
Hepatitis B virus and aflatoxin, is rare in the Nordic countries, and a large
proportion of primary liver cancers can therefore be attributed to alcohol
consumption. The highest risks of liver cancer were seen in occupational
categories with easy access to alcohol at the work place or with cultural
traditions of high alcohol consumption, such as waiters, cooks, beverage
workers, journalists and seamen. The risk of colon cancer has been related to
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