Instrument Variable Name: SELNM
How many months of the PAST 12 did you take selenium?
*Enter '12' for all 12 months.
01-12 1-12 months
99 Don't know
Universe Text: Sample adults 18+ who have taken selenium in the past 12 months
(1-12) [goto SELNDN] (R,D) [goto HERBSUPP]