Affiliation: | a Departamento de Fisiología (Fisiología Animal), Facultad de Veterinaria, UCM, Madrid 28040, Spain b Departamento de Produccion Animal y Conservación de Recursos Zoogenéticos, INIA. Madrid 28040, Spain c Present address: Bond Life Sciences Center, University of Columbia, Columbia Missouri 65211, USA d School of Agriculture, Food Science and Veterinary Medicine, UCD, Belfield, Dublin, Ireland |