title: Authors' response.
authors.forename: Le
authors.initials: L
authors.lastname: Viet
authors.forename: Hans
authors.initials: H
authors.lastname: Husum
mesh_terms: D001782:Blood Donors / Q000706:statistics & numerical data*; D005260:Female; D006509:Hepatitis B / Q000453:epidemiology*; D006526:Hepatitis C / Q000453:epidemiology*; D006801:Humans; D008297:Male; D012423:Rural Health / Q000706:statistics & numerical data*