1. Department of Plant Pathology, University of Nebraska, Lincoln, NE 68583, U.S.A.
2. Department of Molecular Medicine, Scripps Research Institute, La Jolla, CA 92037, U.S.A.
3. Department of Plant, Soil, and Microbial Sciences, Michigan State University, East Lansing, MI 48824, U.S.A.
4. Department of Plant Pathology, University of Wisconsin-Madison, Madison, WI 53706, U.S.A.
5. Department of Plant Pathology and Microbiology, Iowa State University, Ames, IA 50011, U.S.A.
6. Coordinación Regional Culiacán, Centro de Investigación en Alimentación y Desarrollo, Culiacán, Sinaloa 80110, Mexico
7. Department of Plant Science and Landscape Architecture, University of Connecticut, Storrs, CT 06269-4067, U.S.A.