SHARES OF COMMON STOCK ISSUABLE UPON NUMBER OF CONVERSION OF PREFERRED PREFERRED SELLING HOLDERS SECURITIES SECURITIES - ------------------------------------------------------------- --------- ------------------- Bancroft Convertible Fund, Inc............................... 22,000 15,140 Commonwealth Life Insurance Company (Teamsters -- Camden Non-Enhanced)(1)........................................... 40,000 27,528 Cowen & Company.............................................. 25,000 17,205 Ellsworth Convertible Growth and Income Fund, Inc............ 22,000 15,140 Goldman, Sachs & Co(1)....................................... 8,000 5,506 J.M. Hull Associates, L.P.................................... 7,000 4,817 JMG Convertible Investment L.P.(1)........................... 15,000 10,323 JP Morgan Investment......................................... 30,000 20,646 Lehman Brothers Inc.......................................... 712,650 490,446 Millennium Trading Co., L.P.(1).............................. 15,000 10,323 NatWest Securities Corp...................................... 12,600 8,671 Paloma Securities L.L.C.(1).................................. 10,000 6,882 Retail Clerks Pension Trust.................................. 20,000 13,764 Smith Barney Inc............................................. 65,000 44,733 Tribeca Investments, L.L.C................................... 516,000 355,111 UBS Securities LLC(1)........................................ 25,000 17,205 --------- --------- Total.............................................. 1,545,250 1,063,441 ========= =========

- --------------- (1) In addition to the securities included elsewhere in this Prospectus with respect to such holders. Note: The lists of selling holders set forth in this Prospectus contain certain typographical errors as follows: the aggregate number of Preferred Securities and Shares of Common Stock Issuable Upon Conversion of Preferred Securities set forth in this Prospectus (i) for McMahan Securities Company, L.P. should be 15,000 and 10,323, respectively, instead of 24,500 and 16,861, respectively, (ii) for SBC Warburg, Inc. should be 91,500 and 62,970, respectively, instead of 111,500 and 76,734, respectively, and (iii) for Swiss Bank Corporation London Branch should be 285,000 and 196,137, respectively, instead of 500,000 and 344,100, respectively. 1