[1] Med Univ Vienna, Interuniv Messerli Res Inst Vet Med Vienna, Vienna, Austria
[2] Univ Vienna, Vienna, Austria
[3] Dalhousie Univ, Dept Microbiol & Immunol, Halifax, NS, Canada
[4] Med Univ Vienna, Inst Pathophysiol & Allergy Res, Ctr Pathophysiol Infectiol & Immunol, Vienna, Austria