Where Q 0 is a normalization factor. Once again, we refer to the 'Materials and Methods' sections for the accompanying formal mathematical presentation. As a consequence, we can plot the MPR-Statistical Complexity of the samples of our example as a function of the Normalized Shannon Entropy as can be seen in Figure 22 . Annotated genes. A full list of gene references in this paper along with their descriptions from iHOP (http://www.ihop-net. org/UniPub/iHOP/) can be found in supplementary material reference File S5.  SYSGENET: a meeting report from a new European network for systems genetics The first scientific meeting of the newly established European SYSGENET network took place at the Helmholtz Centre for Infection Research (HZI) in Braunschweig, April 7-9, 2010. About 50 researchers working in the field of systems genetics using mouse genetic reference populations (GRP) participated in the meeting and exchanged their results, phenotyping approaches, and data analysis tools for studying systems genetics. In addition, the future of GRP resources and phenotyping in Europe was discussed. SYSGENET is funded through the COST framework (http://www.cost.eu/about_cost). COST is an intergovernmental framework for European Cooperation in Science and Technology that promotes and coordinates nationally funded research in Europe, through funding of research networks. SYSGENET is coordinated by Klaus Schughart (Helmholtz Center for Infection Research, Braunschweig, Germany) . More detailed information about SYSGENET can be obtained from the website http://www.helmholtzhzi.de/sysgenet/.