Department of Mathematics, Freie Universität Berlin, Berlin, Germany.|Institute for Biology/Genetics, Freie Universität Berlin, Berlin, Germany, NeuroCure Cluster of Excellence, Charité Berlin, Berlin, Germany.|Department of Mathematics, Freie Universität Berlin, Berlin, Germany.|Institute for Biology/Genetics, Freie Universität Berlin, Berlin, Germany.|Institute for Biology/Genetics, Freie Universität Berlin, Berlin, Germany, NeuroCure Cluster of Excellence, Charité Berlin, Berlin, Germany.|Department of Mathematics, Freie Universität Berlin, Berlin, Germany.