(HEMOSOL LOGO)

                               SHAREHOLDER PROXY

         SOLICITED BY MANAGEMENT FOR THE ANNUAL AND SPECIAL MEETING OF
     SECURITYHOLDERS TO BE HELD ON APRIL 20, 2004 AND ANY ADJOURNMENT(S) OR
                            POSTPONEMENT(S) THEREOF

     Reference  is made to the accompanying Management Information Circular (the
"Circular") dated March 10, 2004 relating to the Annual and Special Meeting (the
"Meeting") of securityholders of  Hemosol Inc. ("Hemosol") to  be held on  April
20, 2004 and any adjournment(s) or postponement(s) thereof.

     The  undersigned holder of  common shares (the  "Common Shares") of Hemosol
hereby appoints Lee  D. Hartwell,  the Chief  Executive Officer  of Hemosol,  or
failing  him, Edward E. McCormack, member of  the Board of Directors of Hemosol,
or failing him, George  W. Masters, Vice-Chairman of  the Board of Directors  of
Hemosol, or instead of any of the foregoing,
- ------------------------------------------------------------,  as the nominee of
the undersigned to attend and  act for and on behalf  of the undersigned at  the
Meeting,  to the same extent  and with the same power  as if the undersigned was
personally present at the said Meeting, with power of substitution and,  without
limiting  the generality of the power hereby conferred, the nominees named above
are specifically directed to  vote the Common Shares  registered in the name  of
the undersigned as specified below:

1.   FOR  [ ]     WITHHOLD FROM VOTING IN  [ ]

     (or  if no specification is made, vote "FOR") the election of the directors
     of Hemosol referred to in the Circular.

2.   FOR  [ ]     WITHHOLD FROM VOTING IN  [ ]

     (or if  no  specification is  made,  vote  "FOR") the  appointment  of  the
     auditors  of Hemosol referred  to in the Circular  and the authorization of
     the directors to fix the auditors' remuneration.

3.   FOR  [ ]     AGAINST  [ ]

     (or if no specification is made, vote "FOR") a special resolution, the full
     text of which is set  out as Annex A to  the Circular, approving a plan  of
     arrangement   (the  "Arrangement")  under  section   182  of  the  Business
     Corporations Act (Ontario) involving  Hemosol, its securityholders and  MDS
     Inc.,  providing  for  a  reorganization  of  Hemosol's  business  to allow
     Hemosol's business to  exchange, in  effect, a significant  portion of  its
     existing  and unutilized tax losses and other  tax assets for a $16 million
     cash infusion, all  as more  particularly described  and set  forth in  the
     Circular.

4.   FOR  [ ]     AGAINST  [ ]

     (or  if  no  specification  is made,  vote  "FOR")  an  ordinary resolution
     approving an amendment  to the Amended  and Restated Stock  Option Plan  of
     Hemosol   dated  December  7,  2000  to  increase  the  maximum  number  of


     Common Shares reserved for issuance thereunder from 3,031,712 to  5,499,298
     in  order  to ratify  the conditional  grant of  certain stock  options, as
     referred to in the Circular.

     FURTHER, IF THE SPECIAL RESOLUTION IN ITEM 3 IS PASSED:

5.   FOR  [ ]     AGAINST  [ ]

     (or if  no  specification  is  made, vote  "FOR")  an  ordinary  resolution
     approving  a stock option plan for  New Hemosol, the effective successor to
     Hemosol, as referred to in the Circular.

6.   FOR  [ ]     AGAINST  [ ]

     (or if  no  specification  is  made, vote  "FOR")  an  ordinary  resolution
     approving  an amendment  and restatement  of the  by-laws of  LPBP Inc., as
     Hemosol will  be renamed  under  the Arrangement,  as  referred to  in  the
     Circular.

7.   To  vote at the  nominee's discretion upon any  amendments or variations to
     the matters specified in the notice of Meeting or upon any other matters as
     may  properly   come  before   the  Meeting   or  any   adjournment(s)   or
     postponement(s) thereof.

The  undersigned ratifies and confirms all that  the nominee may do by virtue of
the power granted hereby.

DATED THIS
- --------------------- DAY OF
- ------------------------------------, 2004.

                                         ---------------------------------------
                                         Signature of Shareholder

                                         ---------------------------------------
                                         Name of Shareholder
                                         (please print)

NOTES:

1.   If undated, this Form of Proxy shall be deemed to bear the date on which it
     is mailed by or on behalf of management of Hemosol.

2.   The Common Shares to which  this Form of Proxy  relates will be voted  for,
     against,  or withheld from voting,  as the case may  be, in accordance with
     the foregoing instructions.

3.   A HOLDER  OF  COMMON  SHARES MAY  APPOINT  A  PERSON (WHO  NEED  NOT  BE  A
     SHAREHOLDER  OF HEMOSOL), OTHER THAN THE PERSONS DESIGNATED IN THIS FORM OF
     PROXY, AS NOMINEE TO ATTEND AND ACT  FOR AND ON BEHALF OF THAT  SHAREHOLDER
     AT  THE  MEETING. A  holder of  Common  Shares may  exercise that  right by
     inserting the name of that person in the blank space provided on this  Form
     of Proxy or by completing another appropriate Form of Proxy.

4.   This Form of Proxy, when properly executed, confers discretionary authority
     on  the persons named herein to vote on any amendment(s) or variation(s) to
     the resolutions  referred to  in the  notice of  Meeting and  on any  other
     matter(s)   properly  coming  before  the  Meeting.  If  any  amendment(s),
     variation(s) or  other matter(s)  properly comes  before the  Meeting,  the
     proxy  will be voted  in the discretion  of the persons  named therein. The
     persons named in this Form of Proxy are directors and/or senior officers of
     Hemosol.

5.   This Form of  Proxy must  be signed  and dated  by the  shareholder or  the
     shareholder's  attorney authorized in  writing or, if  the shareholder is a
     corporation, by an officer or attorney thereof duly authorized.

6.   To be effective,  this Form of  Proxy must  be received either  by mail  or
     delivery  addressed  to  Computershare  Trust  Company  of  Canada  at  100
     University Avenue,  9th Floor,  Toronto, Ontario  M5J 2Y1  or by  facsimile
     toll-free  at 1-866-249-7775 (or in the Toronto area at (416) 263-9524), in
     each case prior to 5:00  p.m. (Toronto time) on April  16, 2004 or, if  the
     Meeting  is  adjourned  or postponed,  not  less than  48  hours (excluding
     Saturdays, Sundays and holidays) before  the time the adjourned Meeting  is
     reconvened or the postponed Meeting is convened. The Form of Proxy may also
     be  deposited with the scrutineers of the  Meeting, to the attention of the
     chair of the Meeting,  at or immediately prior  to the commencement of  the
     Meeting or any postponement(s) or adjournment(s) thereof.

7.   Holders  of Common Shares who also  hold warrants to purchase Common Shares
     and/or broker compensation options to purchase Common Shares and/or  Common
     Share  purchase warrants of  Hemosol and who  wish to appoint  a nominee to
     attend the Meeting and vote such warrants or broker compensation options on
     their behalf, must  complete a  separate form  of proxy,  printed on  green
     paper,  which form of  proxy is enclosed  with the Circular  mailed to such
     shareholders and  which  may  also be  obtained  from  Computershare  Trust
     Company of Canada at the address indicated above.