EXHIBIT 23.2



                               ARTHUR ANDERSEN LLP



                    CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS


As independent public accountants, we hereby consent to the incorporation by
reference in this registration statement of our report dated January 29, 1999
included in LeukoSite, Inc.'s Form 10-K for the year ended December 31, 1998
and to all references to our Firm included in this registration statement.


                                           /s/ Arthur Andersen LLP
                                           -----------------------
                                           Arthur Andersen LLP

Boston, Massachusetts
December 1, 1999