1. Biomolecular Mass Spectrometry and Proteomics; Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences; Utrecht University and Netherlands Proteomics Centre; Utrecht The Netherlands
2. SCIEX; Phoenix House; Lakeside Drive; Centre Park; Warrington UK
3. Current address: Erik L. de Graaf, Fondazione Pisana per la Scienza ONLUS; Via Panfilo Castaldi 2; 56121 Pisa Italy