1. Department of Archaeology and Anthropology; University of Cambridge; Cambridge United Kingdom
2. Laboratory for Evolutionary Medicine, Department of Anthropology; University of Texas at San Antonio, San Antonio, Texas
3. Department of Psychology; Macquarie University; Sydney Australia
4. Department of Anthropology; Western University, London; Ontario N6A 3K7 Canada
5. UCL Institute of Child Health; Childhood Nutrition Research Centre; London United Kingdom
6. Laboratory for Evolutionary Medicine; Department of Anthropology, Baylor University