1. Center for the Study of the First Americans, Departments of Anthropology and Geography, Texas A&M University, 4352 TAMU, College Station, TX 77843–4352, USA.
2. To whom correspondence should be addressed.
3. Stafford Research, 200 Acadia Avenue, Lafayette, CO 80026–1845, USA.
4. Centre for GeoGenetics, University of Copenhagen, Øster Voldgade 5-7, 1350 Copenhagen, Denmark,
5. Park Museum Management Program, National Park Service, 1201 Oakridge Drive, Suite 150, Fort Collins, CO 80525, USA.
6. 245 Southeast Derby Street, Pullman, WA 99163–2217, USA.
7. Novo Nordisk Foundation Center for Protein Research, Faculty of Health Sciences, University of Copenhagen, Blegdamsvej 3b, 2200 Copenhagen, Denmark.