1. Department of Microbiology , Clínica Universidad de Navarra , Madrid, Spain
2. Department of Microbiology , Clínica Universidad de Navarra , Pamplona, Spain
3. Institute of Tropical Health Universidad de Navarra (ISTUN) , Pamplona, Spain
4. Navarra Institute for Health Research (IdiSNA) , Pamplona, Spain
5. Infectious Diseases Division, Department of Microbiology , Clínica Universidad de Navarra , Pamplona , Spain