title: Reply to Sadlier, Bergin, and Merry.
authors.affiliation: Travel Medicine Center, Mount Auburn Hospital, Cambridge.
authors.forename: Lin H
authors.initials: LH
authors.lastname: Chen
authors.forename: Mary E
authors.initials: ME
authors.lastname: Wilson
mesh_terms: D006801:Humans; D055552:Infectious Disease Medicine / Q000379:methods*; D038622:Internationality; D057193:Medical Tourism