Affiliation: | a Depts. of Anthropology and Zoology, Miami University, Oxford, OH 45056, USA b Depts. of Anthropology and Evolution, Ecology, and Organismal Biology, The Ohio State University, Columbus, OH 43210, USA c Dept. of Biological Sciences, University of Stirling, Stirling FK9 4LA, Scotland, UK d Centre International de Recherches Médicales, P.B. 769, Franceville, Gabon |