* Collagen Corp., Palo Alto, Calif., appointed MichaelLevitt to the position of vice president of operations.* Gensia Inc., San Diego, hired Patrick Walsh as executivevice president and chief operating officer of GensiaLaboratories Ltd. Gensia also promoted Rob Hillman to theposition of division vice president, pharmaceutical &delivery systems development, and Stephen Eisold to vicepresident and general manager, pharmaceuticals, NorthAmerica.* Xytronyx Inc., San Diego, appointed David Okrongly asvice president of research and development.* Alexion Pharmaceuticals Inc., New Haven, Conn.,appointed Bernadette Alford to the newly created positionof vice president, regulatory affairs and projectmanagement.* Matrix Pharmaceutical Inc., Menlo Park, Calif., hiredMorgan Stewart as director, biostatistics and datamanagement.

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