[1] Univ Autonoma Barcelona, Fac Biociencies, Unitat Antropol Biol, Barcelona, Spain
[2] Univ Barcelona, Sch Med, Barcelona, Spain
[3] Hosp Univ Sagrat Cor, Orthoped & Trauma Surg Dept, Viladomat 288, Barcelona 08029, Spain
[4] Univ Autonoma Madrid, Fac Biol, Dept Biol, Madrid, Spain
[5] Hosp San Juan Dios, Pediat Neurosurg Dept, Barcelona, Spain