1. Centre
Européen de Calcul Atomique et Moléculaire, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
2. NCCR
MARVEL, EMPA, Swiss Federal Laboratories for Materials Science and Technology, 8600 Dübendorf, Switzerland
3. Zurich
Research Laboratory, IBM Research GmbH, 8803 Rüschlikon, Switzerland