1. Physical Chemistry of Biosystems, Institute of Physical Chemistry, Heidelberg University, D-69120 Heidelberg, Germany
2. Institut Charles Sadron (CNRS UPR 22), University of Strasbourg, 23 rue du Loess, F-67034 Strasbourg Cedex, France
3. Center for Integrative Medicine and Physics, Institute for Advanced Study, Kyoto University, 606-8501 Kyoto, Japan