The study tracked more than 60,200 elderly Hongkongers for 10 to 13 years, from 1998 to 2011.

Hong Kong's elderly face special air pollution risk, unique study finds

Research over 13 years shows a link between fine particles and increased death rates

Topic |   Hong Kong air pollution

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The study tracked more than 60,200 elderly Hongkongers for 10 to 13 years, from 1998 to 2011.
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