1. Department of Anatomy, Physiology, and Biochemistry, Swedish University of Agricultural Sciences, Centre for Veterinary Medicine and Animal Science, Box 7045, 756 51 Uppsala, Sweden
2. Departamento de Ciencia de Materiales, ETSI Caminos, Canales y Puertos, Universidad Politécnica de Madrid, 28040 Madrid, Spain
3. Centro de Tecnologı́a Biomédica, Universidad Politécnica de Madrid, 28223 Pozuelo de Alarcón (Madrid), Spain
4. Department of Neurobiology, Care Sciences and Society (NVS), Division of Neurogeriatrics, Karolinska Institutet, NEO, 141 83 Huddinge, Sweden
5. Department of Biochemistry and Biophysics, The Arrhenius Laboratories for Natural Sciences, Stockholm University, S-106 91 Stockholm, Sweden