1. Department of Chemistry, Sapienza University of Rome, I-00185 Rome, Italy
2. Division of Physical Chemistry, Department of Chemistry, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
3. Institute of Physical Chemistry, RWTH Aachen University, DE-52056 Aachen, Germany
4. Leibniz-Institut für Polymerforschung e.V. Institut für Physikalische Chemie und Physik der Polymere, DE-01069 Dresden, Germany
5. JARA-SOFT, 52056 Aachen, Germany