1. Institut national de la santé et de la recherche médicale (Inserm), Institute for Research on Environmental and Occupational Health (IRSET), Inserm UMR1085, 9, avenue du Prof. Léon Bernard, 35 000 Rennes, France
2. University of Rennes 1, F-35000 Rennes, France
3. Institute of Electronics and Telecommunications of Rennes (IETR), UMR CNRS 6164, F-35000 Rennes, France