1 Department of Microbiology, Faculty of Medicine, University of Peradeniya, Peradeniya, Sri Lanka.
2 Department of Microbiology, Hokkaido University Graduate School of Medicine, Hokkaido University, Kita-15, Nishi-7, Kita-ku, Sapporo 060-8638, Japan. Electronic address: yosimatu@med.hokudai.ac.jp.
3 Postgraduate Institute of Science (PGIS), University of Peradeniya, Peradeniya, Sri Lanka.
4 Nephrology and Transplantation Unit, Teaching Hospital Kandy, Kandy, Sri Lanka.
5 Department of Microbiology, Hokkaido University Graduate School of Medicine, Hokkaido University, Kita-15, Nishi-7, Kita-ku, Sapporo 060-8638, Japan.