1. Department of Laboratory Medicine, National University Hospital, Singapore, Singapore.
2. Department of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California, USA.
3. Cambridge University Hospitals Trust, Addenbrookes Hospital, Cambridge, United Kingdom.
4. Department of Medicine, University of Southern California, Los Angeles, California, USA.
5. Ref4U (Former Laboratory for Analytical Chemistry)—Laboratory of Toxicology, Department of Bioanalysis, Faculty of Pharmaceutical Sciences, Ghent University, Ghent, Belgium.
6. Charité–Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin and Berlin Institute of Health, Institut für Experimentelle Endokrinologie, Berlin, Germany.