1. Center for Proteomics and Metabolomics; Leiden University Medical Center (LUMC); Albinusdreef 2 2300 RC Leiden The Netherlands
2. AIMMS Division of BioAnalytical Chemistry; VU University Amsterdam; De Boelelaan 1083 1081 HV Amsterdam The Netherlands
3. Department für Pharmazie, Zentrum für Pharmaforschung; Ludwig-Maximilians-Universität; München Butenandtstr. 5-13 81377 Munich Germany
4. hyphen MassSpec; de Wetstraat 8 2332 XT Leiden The Netherlands