—The Special Communication entitled "The Cochrane Collaboration: Preparing, Maintaining, and Disseminating Systematic Reviews of the Effects of Health Care," published in the December 27, 1995, issue of The JOURNAL (1995;274:1935-1938), included an out-of-date price for a year's subscription to the Cochrane Database of Systematic Reviews. Prices begin at $125 and are based on single- through institutional-user rates. Also, on page 1938, the correct contact address for the Baltimore Cochrane Center is as follows: Kay Dickersin, PhD, and Steven Goodman, MD, PhD, Department of Epidemiology and Preventive Medicine, University of Maryland at Baltimore, 506 W Fayette St, Baltimore, MD 21201-1715; telephone: (410) 706-5295; fax: (410) 328-0110; e-mail: cochrane@umabnet.ab.umd.edu.