title: Korean National Health Insurance Database.
authors.affiliation: Department of Family Medicine, Seoul National University Hospital, Seoul, Korea2J.W. Lee Center for Global Medicine, Seoul National University College of Medicine, Seoul, Korea.
authors.forename: Dong Wook
authors.initials: DW
authors.lastname: Shin
authors.affiliation: Department of Family Medicine, Seoul National University Hospital, Seoul, Korea.
authors.forename: BeLong
authors.initials: B
authors.lastname: Cho
authors.affiliation: Department of Epidemiology, Johns Hopkins Medical Institutions, Baltimore, Maryland4Department of Medicine, Johns Hopkins Medical Institutions, Baltimore, Maryland.
authors.forename: Eliseo
authors.initials: E
authors.lastname: Guallar
mesh_terms: D005260:Female; D006801:Humans; D008180:Lupus Erythematosus, Systemic / Q000453:epidemiology*; D008297:Male