1. Department of Environmental Biology; Centro de Investigaciones Biológicas; Consejo Superior de Investigaciones Científicas; Ramiro de Maeztu 9 28040 Madrid Spain
2. MRC Centre for Molecular Bacteriology and Infection; Department of Medicine; Imperial College London; London SW7 2AZ UK
3. Department of Biotechnology; Gadea Biopharma; Parque Tecnológico de León; Nicostrato Vela s/n 24009 León Spain