1. Univ. Grenoble-Alpes, CNRS, LiPhy, 38000 Grenoble, France
2. Institut Laue-Langevin, 38000 Grenoble, France
3. University of Strasbourg/CNRS, Chemistry Institute, Membrane Biophysics and NMR, UMR7177 Strasbourg, France
4. Institut Universitaire de France, 75231 Paris, France