1. New Mexico Health Enhancement and Marathon Clinics Research Foundation, Albuquerque, NM 87122-1424, USA
2. Hard Tissue Research Unit, Department of Biomaterials & Biomimetics, New York University College of Dentistry, New York, NY 10010-4086, USA
3. Department of Medical Molecular Genetics, Division of Human Genome and Genome Research, National Research Center, Cairo, Egypt
4. Section of Paleopathology, Pathology Institute, Klinikum München-Bogenhausen, Munich, Germany
5. Institute of Evolutionary Medicine, University of Zurich, 8057 Zürich, Switzerland