1. Department of Biomedical Engineering, Groningen University, University Medical Center Groningen, Antonius Deusinglaan 1, 9713 AW Groningen, Netherlands
2. Institute of Metallurgy and Materials Science Polish Academy of Sciences, 25 Reymonta Street, 30-059, Cracow, Poland
3. Department of Analytical Biochemistry, Interfaculty Mass Spectrometry Center, Groningen Research Institute of Pharmacy, University of Groningen, A. Deusinglaan 1, Groningen 9713 AV, The Netherlands