1. Immunovirology Laboratory and Biochemistry Department, Infectious Diseases Service, Virgen del Rocio University Hospital/Biomedicine Institute of Seville (IBIS), Avd. Manuel Siurot s/n, Seville
2. Centro de Biología Molecular Severo Ochoa (CSIC‐UAM), Madrid
3. Centro de Microbiología, Instituto de Salud Carlos III, Madrid
4. Laboratory Inmuno‐Biología Molecular, Hospital General Universitario Gregorio Marañón, Madrid, Spain