1. Instituto de Química Médica (IQM, CSIC), E-28006 Madrid, Spain
2. Laboratory of Virology and Chemotherapy, Rega Institute for Medical Research, Department of Microbiology and Immunology, University of Leuven, B-3000 Leuven, Belgium
3. Departamento de Ciencias Biomédicas y Unidad Asociada IQM-UAH, Universidad de Alcalá, E-28805 Alcalá de Henares, Spain