1. Institute of Microbiology, Tartu University,1 and
2. Microbiology and Tumor Biology Center, Karolinska Institute,2 and
3. Swedish Institute for Infectious Disease Control,3 Stockholm, and
4. Tartu University Lung Hospital, Clinicum,4 Tartu, and
5. Kivimäe Hospital, Tallinn,5Estonia, and
6. Department of Bacteriology, Biomedicum, Swedish University for Agricultural Sciences, Uppsala,6 Sweden