<PAGE> 1
Prospectus Supplement filed pursuant to Rule 424(b)(3)
PROSPECTUS SUPPLEMENT NO. 1
TO PROSPECTUS DATED DECEMBER 11, 1998
REGISTRATION NO. 333-64017
We are amending our prospectus dated December 11, 1998, registering
certain resales of our $100,000,000 aggregate principal amount of 5% Convertible
Subordinated Notes due 2003 and the shares of our common stock, issuable upon
conversion of the Notes. This revised information is presented as of February
15, 1999. To the extent the information here differs from the information set
forth for each of these entities in our prospectus, this information supersedes
any prior information.
The information concerning the following entities in the Selling
Securityholders section of the Prospectus located on pages 75 through 78
<PAGE> 2
is amended to read:
<TABLE>
<CAPTION>
Principal Amount of Notes
Name of --------------------------------
Selling Securityholders Owned Offered
----------------------- ---------- ----------
<S> <C> <C>
BNP Arbitrage SNC 3,000,000 3,000,000
Donaldson, Lufkin Jenrette Securities Corp. 3,580,000 3,580,000
Forest Alternative Strategies Fund A-5 3,730,000 3,730,000
Forest Alternative Strategies Fund A-5I 300,000 300,000
Forest Alternative Strategies Fund A-5M 75,000 75,000
Forest Global Convertible Fund A-5 4,500,000 4,500,000
LLT Limited 200,000 200,000
Prudential Securities, Inc. 10,640,000 10,640,000
True Value Fund, L.P. 3,700,000 3,700,000
</TABLE>
<TABLE>
<CAPTION>
Common Stock
-------------------------------------
Number of
Number of Shares
Shares Beneficially
Beneficially Owned upon Percent of
Owned prior to Conversion of Outstanding
Name of Selling Securityholder this Offering the Notes(1) Shares(2)
- ------------------------------ ------------- -------------- -----------
<S> <C> <C> <C>
BNP Arbitrage SNC(5) 120,665 120,665 *
Donaldson, Lufkin Jenrette
Securities Corp. 132,359 132,359 *
Forest Alternative Strategies
Fund A-5 137,095 137,095 *
Forest Alternative Strategies
Fund A-5I 11,091 11,091 *
Forest Alternative Strategies
Fund A-5M 2,772 2,772 *
Forest Global Convertible Fund
A-5 166,373 166,373 *
LLT Limited 7,394 7,394 *
Prudential Securities, Inc. 393,382 393,382 *
True Value Fund, L.P. 136,796 136,796 *
</TABLE>
- ---------------
(5) Includes 9,750 shares of common stock beneficially owned by the Selling
Securityholder.
