NAC.260
During {the/those} month(s), about how many {DAYS/DAYS PER MONTH} did you take vitamin C?
VITCDNO
[ ] NUMBER
(01-30) 01-30 days
(30) All of them
(96) Other
(97) Refused
(99) Don't know
VITCDTP
[ ] TIME PERIOD
(1) Days per week
(2) Days per month
(6) Other
(7) Refused
(9) Don't know