Dept. of Mathematical Sciences and Technology, Norwegian University of Life Sciences, xc3x85s, Norway, Letten Centre and GliaLab, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway, Centre for Molecular Medicine Norway, University of Oslo, Oslo, Norway.|Dept. of Mathematical Sciences and Technology, Norwegian University of Life Sciences, xc3x85s, Norway, Department of Neuroscience and Pharmacology, University of Copenhagen, Copenhagen, Denmark, Dept. of Computational Biology, School of Computer Science and Communication, Royal Institute of Technology (KTH), Stockholm, Sweden.|Dept. of Mathematical Sciences and Technology, Norwegian University of Life Sciences, xc3x85s, Norway, Inst. of Neuroscience and Medicine (INM-6), Computational and Systems Neuroscience & Inst. for Advanced Simulation (IAS-6), Theoretical Neuroscience, Jxc3xbclich Research Centre and JARA, Jxc3xbclich, Germany.|Dept. of Mathematical Sciences and Technology, Norwegian University of Life Sciences, xc3x85s, Norway, Dept. of Physics, University of Oslo, Oslo, Norway.