1. GBF – German Research Centre for Biotechnology, Mascheroder Weg 1, D-38124 Braunschweig, Germany
2. BCCM/LMG Bacteria Collection, Universiteit Gent, K.L. Ledeganckstraat 35, B-9000 Gent, Belgium
3. Area de Microbiologia, Campus UIB - Edifici Guillem Colom, Universitat de les Illes Balears, Crta. Valldemossa km 7·5, 07122 Palma de Mallorca, Spain
4. Dept of Microbiology and Immunology, University of British Columbia, Vancouver, British Columbia, Canada
5. The Macaulay Research Institute, Craigiebuckler, Aberdeen AB15 8QH, UK