Phonak Hearing Systems 2001 Storico Phonak Phonak Hearing Systems 2001 GS2 Svizzera Roger Beuchat Phonak Hearing Systems Pierre Bourquenoud Matthias Buxhofer Christian Charriere David Derepas Nicolas Dumont Cédric Fragnière Bert Grabsch Alexandre Moos Jean Nuttli Michael Reihs Stefan Richner Alexandre Usov René Stadelmann Uwe Straumann Lukas Zumsteg