1 Paleoanthropology Group, Department of Paleobiology, Museo Nacional de Ciencias Naturales, Calle José Gutiérrez Abascal, 2, 28006 Madrid, Spain; Department of Biology, Faculty of Sciences, Universidad Autónoma de Madrid, Calle Darwin, 2, 28049 Madrid, Spain. Electronic address: jolopezr@mncn.csic.es.
2 Physical Anthropology Unit, Department of Biodiversity, Ecology, and Evolution, Faculty of Biological Sciences, Universidad Complutense de Madrid, Calle José Antonio Novais, 12, 28040 Madrid, Spain; Centre for Functional Ecology, Laboratory of Forensic Anthropology, Department of Life Sciences, Universidade de Coimbra, CC Martim de Freitas, 3000-456 Coimbra, Portugal.
3 UCL Centre for Integrative Anatomy, Department of Cell & Developmental Biology, Division of Biosciences, Gower Street, London WC1E 6BT, UK.
4 Laboratory for Functional Anatomy, Faculty of Motor Sciences, Université Libre de Bruxelles, Route de Lennik, 808, 1070 Bruxelles, Belgium.
5 Paleoanthropology Group, Department of Paleobiology, Museo Nacional de Ciencias Naturales, Calle José Gutiérrez Abascal, 2, 28006 Madrid, Spain.
6 Instituto de Investigación Hospital Universitario La Paz, Paseo de la Castellana, 261, 28046 Madrid, Spain.
7 Instituto de Investigación Hospital Universitario La Paz, Paseo de la Castellana, 261, 28046 Madrid, Spain; Centro de Investigación Biomédica en Red de Enfermedades Respiratorias, Instituto de Salud Carlos III, Avenida de Monforte de Lemos, 5, 28029 Madrid, Spain; Department of Medicine, Faculty of Medicine, Universidad Autónoma de Madrid, Calle Arzobispo Morcillo, 4, 28029 Madrid, Spain.