1. Plant Pathology and Plant-Microbe Biology Section, School of Integrative Plant Science, Cornell University, 334 Plant Science Building, Ithaca, NY 14853-5904, USA
2. Lehrstuhl Biochemie, Department Biologie - Universität Erlangen-Nürnberg, Staudtstrasse 5, 91058 Erlangen, Germany
3. Institute for Microbiology, Universität Stuttgart, Allmandring 31, 70569 Stuttgart, Germany
4. Julius Kühn-Institut Institute for Epidemiology and Pathogen Diagnostics, Messeweg 11/12, 38104 Braunschweig, Germany