Give me 'Section 4. CO-BRANDED CAREER CENTER' for this agreement: 1 EXHIBIT 10.26
Confidential Treatment Requested
 CO-BRANDING AGREEMENT
 This Co-Branding Agreement (this "Agreement") by and between VerticalNet, Inc., a Pennsylvania corporation having a principal place of business at 700 Dresher Road, Suite 100, Horsham, Pennsylvania, PA 19044 ("VerticalNet"), and Neoforma.com, Inc., a Delaware corporation having a principal place of business at 3255-7 Scott Boulevard, Santa Clara, CA 95054 ("Neoforma"), is dated as of November 19, 1999 (the "Effective Date").
 In consideration of the mutual covenants herein, and intending to be legally bound hereby, the Parties agree as follows:
1. DEFINITIONS.
 1.1 ADVERTISING shall mean any paid advertisements, links, pointers, sponsorships, buttons, banners, navigation, or any other placements or promotions or similar services or rights on a Site, but excluding Advertising that is not paid for or which is part of an overall partnering or revenue sharing arrangement and any Product Listings.
 1.2 AFFILIATE shall mean, when used with reference to a Party, any individual or entity directly or indirectly controlling, controlled by or under common control with such Party. For purposes of this definition, "control" means the direct or indirect ownership of at least 50% of the outstanding voting securities of a Party, or the right to control the policy decisions of such Party.
 1.3 CAREER CENTER GROSS MARGIN shall have the meaning ascribed thereto in Section 10.5.1 [CO-BRANDED CAREER CENTER].
 1.4 CO-BRANDED CAREER CENTER shall mean the Site located at an URL to be mutually agreed upon (which agreement shall not be unreasonably withheld or delayed) containing a VerticalNet Mark and a Neoforma Mark listing openings for positions and posting other career information in the medical and healthcare fields substantially in the form of the existing "Career Center" portions of the VerticalNet Medical Online Communities.