title: Reply.
authors.affiliation: Massachusetts General Hospital, Harvard Medical School, Boston, MA.
authors.forename: Sheila L
authors.initials: SL
authors.lastname: Arvikar
authors.affiliation: Massachusetts General Hospital, Harvard Medical School, Boston, MA.
authors.forename: Allen C
authors.initials: AC
authors.lastname: Steere
mesh_terms: D006801:Humans; D008193:Lyme Disease