title: Korean National Health Insurance Database--Reply.
authors.affiliation: Cancer Prevention Institute of California, Freemont2Stanford Cancer Institute, Stanford University, Stanford, California.
authors.forename: Ann
authors.initials: A
authors.lastname: Hsing
authors.affiliation: Stanford Prevention Research Center, Stanford University, Stanford, California.
authors.forename: John P A
authors.initials: JP
authors.lastname: Ioannidis
mesh_terms: D005260:Female; D006801:Humans; D008180:Lupus Erythematosus, Systemic / Q000453:epidemiology*; D008297:Male