title: Targeting messages to supplement users.
authors.affiliation: Oregon State University, Corvallis 97331.
authors.forename: C A
authors.initials: CA
authors.lastname: Raab
authors.forename: M A
authors.initials: MA
authors.lastname: Bock
authors.forename: K
authors.initials: K
authors.lastname: Carpenter
authors.forename: D
authors.initials: D
authors.lastname: Medeiros
authors.forename: M
authors.initials: M
authors.lastname: Ortiz
authors.forename: M
authors.initials: M
authors.lastname: Read
authors.forename: H G
authors.initials: HG
authors.lastname: Schutz
authors.forename: E T
authors.initials: ET
authors.lastname: Sheehan
authors.forename: D K
authors.initials: DK
authors.lastname: Williams
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D006266:Health Education / Q000379:methods*; D006801:Humans; D008297:Male; D008402:Mass Media; D008875:Middle Aged; D008903:Minerals / Q000008:administration & dosage*; D015205:Northwestern United States; D010342:Patient Acceptance of Health Care; D011897:Random Allocation; D015206:Southwestern United States; D014815:Vitamins / Q000008:administration & dosage*
chemical_list: D008903:Minerals; D014815:Vitamins