1 Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Schöpfstrasse 41/R311, 6020, Innsbruck, Austria.
2 Department of Internal Medicine II, Medical University of Innsbruck, Innsbruck, Austria.
3 Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Schöpfstrasse 41/R311, 6020, Innsbruck, Austria. wilfried.posch@i-med.ac.at.
4 Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Schöpfstrasse 41/R311, 6020, Innsbruck, Austria. doris.wilflingseder@i-med.ac.at.