Exhibit 6
JOINT FILING AGREEMENT
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PURSUANT TO RULE 13d-1(k)
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The undersigned acknowledge and agree that the foregoing statement of
Schedule 13D is filed on behalf of each of the undersigned and that all
subsequent amendments to this Schedule 13D shall be filed on behalf of each
of the undersigned without the necessity of filing additional joint filing
agreements. The undersigned acknowledge that each shall be responsible for
the timely filing of such amendments, and the completeness and accuracy of
the information concerning it contained therein, but shall not be
responsible for the completeness and accuracy of the information concerning
the others, except to the extent that it knows or has reason to believe
that such information is inaccurate.
Dated: April 28, 2006
/s/ Xxxxxxx Soon-Shiong
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Xxxxxxx Soon-Shiong
/s/ Xxxxxx X. Xxxxxx
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Xxxxxx X. Xxxxxx
THE THEMBA 2005 TRUST I
By: /s/ Xxxxxx X. Xxxxxx
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Xxxxxx X. Xxxxxx, Trustee
THE THEMBA 2005 TRUST II
By: /s/ Xxxxxx X. Xxxxxx
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Xxxxxx X. Xxxxxx, Trustee
CALIFORNIA CAPITAL LIMITED PARTNERSHIP
BY: THEMBA LLC, ITS GENERAL PARTNER
By: /s/ Xxxxxx X. Xxxxxx
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Name: Xxxxxx X. Xxxxxx
Title: Manager
THEMBA LLC
By: /s/ Xxxxxx X. Xxxxxx
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Name: Xxxxxx X. Xxxxxx
Title: Manager