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 LeuokoSite, 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
November 2, 1999