1. Immunology and Cell Biology Department, Institute of Parasitology and Biomedicine López Neyra-CSIC, Parque Tecnológico Ciencias de la Salud, 18100 Granada, Spain.
2. Present address: Department of Microbiology and Immunology, Temple University School of Medicine, Philadelphia, PA 19140.
3. Present address: Estación Experimental del Zaidín-CSIC, 18008 Granada, Spain.
4. Andalusian Stem Cell Bank, Center for Biomedical Research, Granada University, Parque Tecnológico Ciencias de la Salud, 18100 Armilla, 18100 Granada, Spain.
5. Present address: Université de Lyon, F-69000 Lyon, France; INSERM, U758, Human Virology Department, F-69007 Lyon, France; Ecole Normale Supérieure de Lyon, F-69007 Lyon, France.