title: Illness in travelers visiting friends and relatives: what can be concluded?
authors.forename: Ron H
authors.initials: RH
authors.lastname: Behrens
authors.forename: Christoph H
authors.initials: CH
authors.lastname: Hatz
authors.forename: Brian D
authors.initials: BD
authors.lastname: Gushulak
authors.forename: Douglas W
authors.initials: DW
authors.lastname: MacPherson
mesh_terms: D015331:Cohort Studies; D003141:Communicable Diseases / Q000453:epidemiology*; D004641:Emigration and Immigration; D005190:Family; D033062:Friends; D006801:Humans; D012307:Risk Factors; D014195:Travel / Q000145:classification