1. Department of Genetics Stanford University School of Medicine Stanford CA 94305 USA
2. Centre for GeoGenetics Natural History Museum of Denmark University of Copenhagen Øster Voldgade 5–7 1350 Copenhagen K Denmark
3. Faculty of Archaeology Leiden University PO Box 9515 2300 Leiden The Netherlands
4. IdentifyGenomics LLC Menlo Park CA 94025 USA
5. Undergraduate Program on Genomic Sciences Universidad Nacional Autónoma de México 62210 Cuernavaca Mexico