Exhibit 99.1

                            Explanation of Responses

(1) Represents shares of common stock issuable upon conversion of 2,990 shares
of Series A Convertible Preferred Stock sold by the reporting person on February
6, 2008. The conversion terms of such shares of Series A Convertible Preferred
Stock are more fully described in note 2 below.

(2) After giving effect to the sale described in note 1 above, represents shares
of common stock issuable upon conversion of 2,360,631 shares of Series A
Convertible Preferred Stock convertible beginning on July 31, 2008 for the
number of shares obtained by dividing the aggregate liquidation preference of
such shares ($100 per share) by the then-effective conversion price. The number
of shares of common stock issuable upon conversion of such shares of Series A
Convertible Preferred Stock will depend upon the conversion price which will be
the product of 0.83 multiplied by the volume weighted average sale price on the
New York Stock Exchange or other principal securities exchange upon which the
issuer's common stock is then listed for the 22 trading days beginning on and
including February 1, 2008 (disregarding the trading days during such period
having the highest and lowest volume weighted average sale price), subject to
certain adjustments contained in the issuer's Certificate of Designation of 4.0%
Series A Convertible Preferred Stock and 4.0% Series B Convertible Preferred
Stock. Beginning 60 days prior to the date upon which the shares of Series A
Convertible Preferred Stock become convertible, the reporting person believes
that it is reasonably likely that the reporting person will be deemed to have
beneficial ownership of more than 10% of the issuer's outstanding shares of
common stock. Additionally, the holders of Series A Convertible Preferred Stock
have the right to elect several members of the issuer's board of directors. As a
result, the reporting person may be deemed a director by designation, though
nothing in this report shall be an admission that the reporting person is such a
director.

(3) No Expiration Date.