Aastrom Biosciences Inc., of Ann Arbor, Mich., appointed Robert Bard vice president, regulatory affairs and quality systems.

Aclara BioSciences Inc., of Mountain View, Calif., promoted Sharat Singh to senior vice president of eTag assay technology, named Dennis Harris senior vice president of systems integration and business development, and promoted Dawn Madden to vice president of marketing.

Adolor Corp., of Exton, Pa., appointed Wei Du vice president biometrics and data management and added Amy Romero-Gasman as senior director, marketing, and David Stephon as senior director, quality assurance.

Arena Pharmaceuticals Inc., of San Diego, appointed Clayburn La Force and Duke Bristow to its board.

Astex Technology Ltd., of Cambridge, UK, appointed Lyn Leaper vice president of intellectual property.

Aton Pharma Inc., of Tarrytown, N.Y., formed a scientific advisory board consisting of Paul Marks as chairman, Joseph Bertino, Ronald Breslow, Samuel Danishefsky, Joseph Goldstein, Richard Rifkind and Daniel Von Hoff.

BioCryst Pharmaceuticals Inc., of Birmingham, Ala., promoted Michael Darwin to chief financial officer, treasurer and secretary.

Bioenvision Inc., of New York, appointed Hugh Griffith as commercial director.

BioFocus plc, of Sittingbourne, UK, appointed Henry Geoffrey McMillan chief operating officer.

Caliper Technologies Corp., of Mountain View, Calif., promoted Anne Kopf-Sill to vice president of new products, Robert Nagle to vice president of product development and Anthony Hendrickson to vice president of finance.

Carrington Laboratories Inc., of Irving, Texas, appointed William Carrion vice president, operations, and promoted Sheri Smith to vice president, medical services.

Cellegy Pharmaceuticals Inc., of South San Francisco, appointed David Karlin vice president, clinical research.