Advancing excellence in laboratory medicine for better healthcare worldwide

Immunosuppressive Drugs (WG-ID)


Name Position Country Term Time in Office
C. Seger Chair CH 2nd  2021 01 - 2023 12
M.J. Barten Member DE    
S. Bergan         Member NO    
M. Brunet Member ES    
U. Christians Member US    
B. de Winter Member NL    
L. Elens Member BE    
D. Grote-Koska Member DE    
V. Haufroid Member BE    
A. Henrion Member DE    
D.W. Holt Member UK    
A. Kessler Member DE    
P.K. Kunicki Member PL    
L. Langman Member US    
S. Masuda Member JP    
D. Moes Member NL    
T. Pawiński Member PL    
L.M. Shaw Member US    
M. Shipkova Member DE    
C. Snozek Member US    
N. Torre Vethe Member NO    
T.  van Gelder Member NL    
M. Vogeser Member DE    
P. Wallemacq Member BE    
E. Wieland Member DE    
T.  Zhang Member CN    



Terms of Reference

  • The WG is devoted to the establishment of candidate reference procedures and reference materials for immunosuppressive drugs (ISDs) as cyclosporine, sirolimus, tacrolimus, everolimus, and mycophenolic acid (MPA). Demonstration of the current state of the art in ISD – TDM by measurement comparison will define the need for harmonization or – if feasible – standardization of measurement services


 Current projects

  • Regulatory framework :
    • Establish and communicate the regulatory framework which allows submitting to the JCTLM reference materials, measurement methods and measurement services established within the WG-ID.
  • Measurement comparison initiative aimed to assess the state of art in ISD TDM:
    • Baseline assessment including method comparability.
    • Influence of secondary reference materials on method comparability.
  • Production of reference materials to be listed in the JCTLM database:
    • Characterization of primary reference materials.
    • Production of primary reference materials.
    • Characterization and production of secondary reference materials.
  • Establishment of reference methods to be listed in the JCTLM database:
    • Design and validation of a candidate reference method by at least two to three partner institutions.
  • Establishing reference procedures:
    • Establishment of a reference laboratory network.
    • Establishment of a reference measurement service network.


List of Corresponding Members, nominated by National Societies

Name Full and Affiliate Member Societies
Muammer Yucel Turkish Biochemical Society (TBS)


List of Corresponding Members, nominated by Corporate Members

Name Corporate members
George Schneider ABBOTT Diagnostics
Judith Taibon ROCHE
Tie Wei SIEMENS Healthcare Diagnostics, Inc.
Bjoern Neubacher THERMO FISHER Scientific



Working Group Chair's contact

PD Dr. Christoph SEGER
Labordiagnostic St. Gallen West AG
Zürcherstrasse 505
9015 St. Gallen



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