text: Christoph Franz, chairman of Roche Holding AG, poses for a photograph following a Bloomberg Television interview at the World Economic Forum (WEF) in Davos, Switzerland, on Thursday, Jan. 19, 2017. World leaders, influential executives, bankers and policy makers attend the 47th annual meeting of the World Economic Forum in Davos from Jan. 17 - 20. Photographer: Simon Dawson/Bloomberg