1. CHARMEC, Division of Dynamics, Department of Mechanical and Maritime Sciences, Chalmers University of Technology, Gothenburg, Sweden
2. CHARMEC, Division of Applied Acoustics, Department of Architecture and Civil Engineering, Chalmers University of Technology, Gothenburg, Sweden
3. SJ AB, Rolling Stock Division, Stockholm, Sweden
4. Lucchini RS, Railway Division, Lovere, Italy