Abstract

(Letters to the Editor are welcomed. They may report new clinical or laboratory observations and new developments in medical care or may contain comments on recent contents of theJournal. They will be published, if found suitable, as space permits. Like other material submitted for publication, Letters must be typewritten in double spacing, submitted in duplicate, and must not exceed two typed pages in length. No more than five references and one figure or table may be used. See “Information for Authors” in this issue for format of references, tabls