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Prospectus Supplement No. 4 | Filed Pursuant to Rule 424(b)(7) | |
(to Prospectus dated October 31, 2007) | Registration No. 333-147067 |
| replacing the information included therein regarding the selling security holder identified in the first column of the Revised Information Regarding Selling Security Holders table below with the information set forth in the Revised Information Regarding Selling Security Holders table below; and |
| adding the information in the Additional Selling Security Holders table below regarding certain selling security holders. | ||
Principal | ||||||||||||||||||||
Amount of | ||||||||||||||||||||
Debentures | Number of Shares of Common Stock | |||||||||||||||||||
Beneficially | Percentage of | Held After | ||||||||||||||||||
Owned and | Debentures | Completion | ||||||||||||||||||
Offered Hereby | Beneficially | Beneficially | Offered | the of | ||||||||||||||||
Name(1) | ($)(2) | Owned (%) | Owned(2)(3) | Hereby(2)(3) | Offering(2)(3) | |||||||||||||||
Bear,
Stearns & Co. Inc. #(4) |
$ | 3,000,000 | * | 112,024 | 112,024 | |
Principal | ||||||||||||||||||||
Amount of | ||||||||||||||||||||
Debentures | Number of Shares of Common Stock | |||||||||||||||||||
Beneficially | Percentage of | Held After | ||||||||||||||||||
Owned and | Debentures | Completion | ||||||||||||||||||
Offered Hereby | Beneficially | Beneficially | Offered | the of | ||||||||||||||||
Name(1) | ($)(2) | Owned (%) | Owned(2)(3) | Hereby(2)(3) | Offering(2)(3) | |||||||||||||||
BNP Paribas
Arbitrage # |
$ | 5,000,000 | 1.54 | % | 186,706 | 186,706 | | |||||||||||||
Elite
Classic Convertible Arbitrage Ltd. (5) |
170,000 | * | 6,348 | 6,348 | |
* | Less than 1%. | |
| The selling security holder is a broker-dealer. | |
| The selling security is an affiliate of a broker-dealer. | |
# | The selling security holder has advised us that it is required to file, or is a wholly-owned subsidiary of a company that is required to file, periodic and other reports with the SEC. | |
(1) | Information concerning other selling security holders will be set forth in supplements to this prospectus supplement from time to time, if required. |
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(2) | Because a selling security holder may sell all or a portion of the Debentures and shares of common stock issuable upon conversion of the Debentures pursuant to this prospectus supplement, an estimate cannot be given as to the number or percentage of Debentures and shares of common stock that the selling security holder will hold upon termination of any sales. The information presented assumes that all of the selling security holders will fully convert the Debentures for cash and shares of common stock and that the selling security holders will sell all the shares of common stock that they received pursuant to such conversion. | |
(3) | Includes the shares of common stock issuable upon conversion of the Debentures. The number of shares of our common stock issuable upon conversion of the Debentures is calculated assuming that the conversion of the full amount of the Debentures held by such holder is effected at the maximum rate provided for upon conversion of the Debentures, which is 37.3412 shares of our common stock per $1,000 principal amount of Debentures, and that we have made an election to fully satisfy our obligation to settle conversions of Debentures in shares of our common stock. See Description of the Debentures Conversion Procedures Settlement Upon Conversion. This conversion rate is subject to adjustment as described under Description of the Debentures Conversion Procedures Conversion Rate Adjustments. Accordingly, the number of shares of our common stock to be sold may increase or decrease from time to time. We will not issue fractional shares of our common stock upon conversion of the Debentures. Instead, we will pay cash in lieu of fractional shares based on the closing sale price of our common stock on the final trading day of the conversion period. | |
(4) | As of February 20, 2008, this selling security holders proprietary accounts were short 61,955 shares of our common stock. | |
(5) | Nathanial Brown and Robert Richardson have voting and dispositive power over the registrable securities held by this selling security holder. |
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