1. Department of Plant Pathology; Kansas State University; 4024 Throckmorton Plant Sciences Center; Manhattan KS 66506 USA
2. International Rice Research Institute (IRRI); Los Baños Laguna 4031 Philippines
3. International Potato Center; 12 Zhongguancun South Street Beijing 100081 China
4. Department of Environmental Science and Policy; University of California; One Shields Avenue Davis CA 95616 USA