title: Effect on response rates of stamps vs a pre-printed business reply envelope in a mailed follow-up survey among middle-aged Danish men.
authors: Merete
authors: M
authors: Osler
authors: Mette
authors: M
authors: Juhl
authors: Rikke
authors: R
authors: Lund
authors: Anne-Marie Nybo
authors: AM
authors: Andersen
authors: Margit
authors: M
authors: Kriegbaum
authors: Ulla
authors: U
authors: Christensen
mesh_terms: D003299:Cooperative Behavior; D003718:Denmark; D006306:Health Surveys; D006801:Humans; D008297:Male; D008875:Middle Aged; D011177:Postal Service; D011795:Surveys and Questionnaires