* Burroughs Wellcome Co., of Research Triangle Park , N.C., said ithas filed a lawsuit alleging that two of its patents are being infringed onby SmithKline Beecham plc's antiviral drug, Famvir. The lawsuit, filedTuesday in U.S. District Court in North Carolina, contends Famvirviolates one patent covering Burroughs Wellcome's Zovirax, andanother patent concerning delivery of an antiviral drug. SmithKlineBeecham denies the patent infringement allegations.* Advanced Tissue Sciences Inc., of La Jolla, Calif., reported that it willproceed with a pivotal clinical trial in the next several months of itsDermagraft-TC for treatment of burns. The decision is based on pilotclinical trial results, which demonstrated the product's potential utilityand durability. The company said findings from the pilot trial showedthat Dermagraft-TC adhered to wound beds in all seven patientsenrolled in the study; that patient autografts on the Dermagraft-TC siteshad a take rate equivalent or better than control sites in all five patientsassessed to date; and that no incidence of rejection, infection or allergicreaction was associated with Dermagraft-TC.

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