[1] University of Washington,Department of Environment and Occupational Health Sciences, School of Public Health and Community Medicine
[2] University of Michigan,Departments of Epidemiology and Environmental Health Sciences, School of Public Health
[3] Hanyang University,Department of Health Management, Graduate School
[4] Seoul National University,Department of Epidemiology and Biostatistics, Graduate School of Public Health and The Institute of Health and Environment
[5] Korea Health Insurance Review Agency,Primary Health Care Team, Research Department