1. Research Institute of Organic Agriculture, Frick, Switzerland
2. Center for Agricultural Research and Ecological Studies, Vietnam National University of Agriculture, Hanoi, Vietnam
3. Faculty of Natural Resources and Environment, Vietnam National University of Agriculture, Hanoi, Vietnam
4. World Vegetable Center, Bangkok, Thailand
5. Faculty of Economics and Rural Development, Vietnam National University of Agriculture, Hanoi, Vietnam
6. Food and Agriculture Organization of the United Nations, Rome, Italy