1. Department of Microbiology and Immunology, Otago School of Medical Sciences, The University of Otago, PO Box 56, Dunedin, New Zealand
2. Department of Biochemistry, Otago School of Medical Sciences, The University of Otago, PO Box 56, Dunedin, New Zealand
3. Institut für Genomforschung und Systembiologie, Centrum für Biotechnologie, Universität Bielefeld, Universitätsstraße 25, 33615 Bielefeld, Germany