1. Digital Systems, RISE Research Institutes of Sweden, SE-411 33 Gothenburg, Sweden
2. Materials and Production, RISE Research Institutes of Sweden, SE-164 40 Kista, Sweden
3. 2dFab AB, SE-853 50 Sundsvall, Sweden
4. Trelleborg Mixing Forsheda AB, SE-331 71 Forsheda, Sweden