About the Authors
Department of Anthropology, University of New Mexico, Albuquerque, New Mexico, United States of America
Department of Anthropology, Pennsylvania State University, University Park, Pennsylvania, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: YCK MDS. Performed the experiments: YCK MDS. Analyzed the data: YCK. Contributed reagents/materials/analysis tools: MDS. Wrote the paper: YCK.