Department of Public Health and Primary Care University of CB2 2SR;
public Health andEpidemiolosy Croup Peninsula Medical School Exeter;
Department of Internal Medicine University of Michigan USA;
Veterans Affairs Center for Practice Management and Outcomes Research Michigan;
Institute for Social Research University of Michigan;
MRC Biostatistics Unit Institute of Public Health Cambridge;
首都医科大学附属北京朝阳医院呼吸内科;