Severin Schwan, currently chief executive officer of Roche Diagnostics, will succeed Franz B. Humer as chief executive officer of the Roche Group effective March 2008. Dr. Humer will focus on his role as chairman of Roche Holdings. Franz B. Humer said, “In view of the increasing complexity of the tasks involved, the board has decided to separate the chairman and CEO roles. I am delighted that we are appointing Severin Schwan, a 40 year-old executive with an outstanding track record and br...