对兽医实验室生物安全建设的思考——法国、瑞典高等级生物安全实验室及设备生产企业考察情况报告

This research uses a nationally representative sample of 1,425 low-income elders from the 1987 National Medical Expenditure Survey (NMES) to assess the independent and interaction effects of health insurance coverage and residence on the use of seven health care services: doctor visits, visits to ot... View More