1. IBM Research - Almaden, San Jose, CA, USA.
2. IBM Research - Zurich, Rüschlikon, Switzerland.
3. IBM T. J. Watson Research Center, Yorktown Heights, NY, USA.
4. EPFL, Lausanne, Switzerland.
5. IBM Tokyo Research Laboratory, Tokyo, Japan.
6. Department of Material Science and Engineering, Pohang University of Science and Technology, Pohang, Korea.