Letters may be submitted via our Web site or by mail, courier, email (pubs@cma.ca) or fax. They should be no more than 250 words long and must be signed by all authors. A signed copy of letters submitted by email must be sent subsequently to CMAJ by fax or regular mail. Letters written in response to an article published in CMAJ must be submitted within 2 months of the article's publication date. CMAJ corresponds only with the authors of accepted letters. Letters are subject to editing and abridgement.