1. Graduate School of Agriculture Science, Tokyo University of Agriculture and Technology, Fuchu, Japan
2. Department of Agriculture, Ministry of Agriculture and Livestock, Agriculture Research and Development Center, Wengkhar, Bhutan
3. Department of Agriculture, Ministry of Agriculture and Livestock, Agriculture Research and Development Sub-Center, Lingmethang, Bhutan
4. Department of Agriculture, Ministry of Agriculture and Livestock, National Post-Harvest Sub-Center, Lingmethang, Bhutan