Despite it not being listed on the Washington Post web site, there does appear
to be a specific address for letters to the editor of the Health section.  It
is <[log in to unmask]>.  If you want your letter published, you must give
them your address and phone number so that they can confirm that you are who
you say you are.
J. Rachael Hamlet
Author, The Breastfeeding Advocacy Page
http://www.clark.net/pub/activist/bfpage/bfpage.html