1 Quantitative Mass Spectrometry Facility, University of Lausanne, Centre Hospitalier Universitaire Vaudois, Rte du Bugnon 46, CH-1011 Lausanne, Switzerland. bertrand.rochat@chuv.ch.
2 Quantitative Mass Spectrometry Facility, University of Lausanne, Centre Hospitalier Universitaire Vaudois, Rte du Bugnon 46, CH-1011 Lausanne, Switzerland.