1. Engineer II, Bureau of Plant Industry-Los Baños National Crop Research Development and Production Support Center 4030, Philippines
2. Senior Researcher, Protected Horticulture Research Institute, NIHHS, RDA, Haman 52054, Korea
3. Researcher, Protected Horticulture Research Institute, NIHHS, RDA, Haman 52054, Korea
4. Rural Extension Instructor, Gyeongsangbuk-do Provincial Agricultural Research and Extension Services, Daegu 41404, Korea