Boulder, Colo.-- Camp Healthcare, Cholestech Corp., Dedicated Distribution Inc. and Sunrise Medical Inc. are the four health care distributors and manufacturers to sign as sponsors of Productbuzz.com, a marketplace designed to draw research pharmacists and home health care workers, the company said Thursday. The sponsors will have the right to develop product marketing campaigns aimed at the target audience. As a service, Productbuzz has built a searchable database of more than 1,000 health care products. Among other marketing vehicles, the sponsors will be able to position advertising that goes along with searches, Productbuzz said. Financial details of the sponsorship agreements were not disclosed. With its first sponsors in tow, Productbuzz plans to continue its expansion into other b-to-b verticals, the company said.