1. Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, Leipzig 04103, Germany.
2. Department of Anthropology, Florida State University, Tallahassee, FL 32310, USA.
3. School for Advanced Research, 660 Garcia St., Santa Fe, NM 87505, USA.
4. European Synchotron Radiation Facility, 71 Avenue des Martyrs, CS-40220, F-38043, Grenoble cedex 09, France.
5. Australian Research Centre for Human Evolution, Griffith University, 170 Kessels Rd., Nathan 4111, Queensland, Australia.
6. Institute of Human Origins, and School of Human Evolution and Social Change, Arizona State University, Tempe, AZ 85287, USA.
7. Centre for Human Evolution Research, Department of Earth Sciences, Natural History Museum, London SW7 5BD, UK.
8. Department of Anthropology, UCL, London WC1H 0BW, UK.
9. Department of Organismal Biology and Anatomy, University of Chicago, Chicago, IL 60637, USA.