CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS EXH. 23 As independent public accountants, we hereby consent to the incorporation by reference in Registration Statement Nos. 33-61903, 333-05795, 333-05797, 333-09257, 333-13259, 333-27927, 333-27929, 333-69717 and 333-91801 of our report dated May 24, 2000 included in this Form 10-K for the year ended March 31, 2000. Boston, Massachusetts June 28, 2000