A few letters will be published if they provide significant news or clarifications of general interest to our readers. The Chief Editor reserves the right to edit and abbreviate the material selected. The author(s) will receive only one acknowledgment of acceptance or rejection. Letters referring to published articles will be forwarded to the authors.
Letters should not exceed 750 words, with up to six references. Brief tabulations of data occasionally may be accepted. Letters should be typed double-spaced throughout and submitted in duplicate. Letters submitted for publication must follow the detailed instructions under "Instructions for Authors."