[1] Max Planck Inst Evolutionary Anthropol, Dept Human Evolut, D-04103 Leipzig, Germany
[2] UCL, Dept Anat & Dev Biol, London WC1E 6BT, England
[3] Arizona State Univ, Sch Human Evolut & Social Change, Inst Human Origins, Tempe, AZ 85287 USA
[4] Univ Georgia, Dept Anthropol, Athens, GA 30602 USA
[5] CNRS, UPR 2147, F-75014 Paris, France
[6] Univ Texas, Dept Anthropol, Austin, TX 78712 USA
[7] Univ St Andrews, Sch Geog & Geosci, St Andrews KY16 9AL, Fife, Scotland