It might be better and quicker if you email them directly:

Janet Woodcock Janet.Woodcock@fda.hhs.gov and/or
Mary Hitch Mary.Hitch@fda.hhs.gov

Thanks to Sun Vaporer for providing the email addresses on page 3 of the following thread.

e-cigarette-forum.com/forum/campaigning-discussions/17742-please-email-fda-following-addy-3.html#post292752