1. Department of Fibre and Polymer Technology; KTH Royal Institute of Technology; SE-100 44 Stockholm Sweden
2. Department of Clinical Science Intervention and Technology; Karolinska Institutet; SE-141 86 Stockholm Sweden
3. Division of Neuronic Engineering; KTH Royal Institute of Technology; SE-141 52 Huddinge Sweden
4. Department of Biosciences and Nutrition; Karolinska Institutet; SE-141 83 Huddinge Sweden