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                                POWER OF ATTORNEY

                                                         Exhibit 24.3


STATE OF NEW YORK    )
                     ) SS
COUNTY OF NEW YORK   )


         KNOW ALL MEN BY THESE PRESENTS that Thomas E. Dobrowski, having an
address at New York, New York, has made, constituted and appointed and BY THESE
PRESENTS, does make, constitute and appoint John M. Zoeller and Howard Walker,
or either of them, having an address at Two North Riverside Plaza, Chicago,
Illinois 60606, his true and lawful Attorney-in-Fact for him and in his name,
place and stead to sign and execute in any and all capacities this Annual Report
on Form 10-K and any or all amendments to this Annual Report on Form 10-K, and
to file the same with all exhibits thereto, and other documents in connection
therewith, with the Securities and Exchange Commission, giving and granting unto
each of such, Attorney-in-Fact, full power and authority to do and perform each
and every act and thing, requisite and necessary to be done in and about the
premises, as fully, to all intents and purposes as he might or could do if
personally present at the doing thereof, with full power of substitution and
revocation, hereby ratifying and confirming all that each of such
Attorney-in-Fact or his substitutes shall lawfully do or cause to be done by
virtue hereof.

         This power of Attorney shall remain in full force and effect until
terminated by the undersigned through the instrumentality of a signed writing.

         IN WITNESS WHEREOF, Thomas E. Dobrowski, has hereunto, set his hand
this 6th day of March, 2001.


                                         /s/ Thomas E. Dobrowski
                                         -----------------------------------
                                         Thomas E. Dobrowski



         I, Cynthia L. Morra, a Notary Public in and for said County in the
State aforesaid, do hereby certify that Thomas E. Dobrowski, personally know to
me to be the same person whose name is subscribed to the foregoing instrument
appeared before me this day in person and acknowledged that he signed and
delivered said instrument as his own free voluntary act for the uses and
purposes therein set forth.

         Given under my hand and notarial seal this 6th day of March, 2001.


                                         /s/ Cynthia L. Morra
                                         -------------------------------------
                                         (Notary Public)


My Commission Expires:


March 30, 2001