CEO Lukas Braunschweiler sits beside as chairman of the board Robert Spoerry (R) of Swiss hearing aid maker Sonova addresses the company's annual news conference in the village of Staefa east of Zurich May 22, 2012. Sonova posted weaker-than-expected first-quarter results on Tuesday, as sales growth disappointed and the strong Swiss francs took its toll. REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: HEALTH BUSINESS)