1. Telecom-Paris, Institut Polytechnique de Paris, Palaiseau, France
2. University of Illinois Urbana-Champaign, Champaign, IL, USA
3. Faculty of Engineering, Bar-Ilan University, Ramat Gan, Israel
4. Imperial College London, London, U.K.
5. Waseda University, Kitakyushu, Japan
6. University of Erlangen-Nürnberg, Erlangen, Germany
7. Yahoo Japan Corporation, Tokyo, Japan