Acknowledgements

We would like to thank Dr Andrew Jobling from the Department of Anatomy and Physiology at the University of Melbourne for the kind gift of the CX3Cr1 mice. The technical expertise in breeding and maintaining our mouse colonies by the School of Biomedical Sciences Bioresources facility at the University of Melbourne is gratefully acknowledged. The technical expertise and facilities of the National Imaging Facility (NIF) and Monash biomedical Imaging.