1. GRTM, Dipartements de Physique et Chimie, Université de Montréal, Case Postal 6128, succursale Centre-Ville, Montréal, Canada H3C 3J7.
2. Howard Hughes Medical Institute, Laboratory of Molecular Neurobiology and Biophysics, Rockefeller University, 1230 York Avenue, New York, NY 10021, USA.