Affiliation: | (1) Department of Microbiology, University Hospital, Ps. S. Vicente 108, 37007 Salamanca, Spain;(2) Department of Otolaryngology, Head and Neck Surgery, University Hospital, Ps. S. Vicente 108, 37007 Salamanca, Spain;(3) Department of Neurology, University Hospital, Ps. S. Vicente 108, 37007 Salamanca, Spain |