1. Thermo Fisher Scientific, Hanna-Kunath Strasse 11, Bremen 28199, Germany
2. Department of Chemistry, Wichita State University, 1845 Fairmount, Wichita, Kansas 67260, United States
3. Biomolecular Mass Spectrometry and Proteomics, Bijvoet Centre for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Padualaan 8, Utrecht 3584 CH, The Netherlands