1. Joint
Mass Spectrometry Center, Chair of Analytical Chemistry, Institute
of Chemistry, University of Rostock, Dr.-Lorenz-Weg 1, 18059 Rostock, Germany
2. Joint
Mass Spectrometry Center, Comprehensive Molecular Analytics, Helmholtz Zentrum München, Ingolstädter Landstraße 1, 85764 Neuherberg, Germany
3. Department
of Anesthesia and Intensive Care, University of Rostock, Schillingallee
35, 18057 Rostock, Germany