Detailed economic status of study subjects.
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*Pandemic period, between April 2009 and July 2010; Post-pandemic period, between August 2010 and the end of survey period.†Income can pay for expense of utilities; light, gas, water, sewerage, telephone.‡Income can pay for expense of food; meat, egg, milk, cereals, vegetable.§Governmental insurance included workers in private organizations.
创建时间：
2015-12-02
