1. Graduate University of Science and Technology Vietnam Academy of Science and Technology Hanoi Vietnam
2. Institute for Tropical Technology, Vietnam Academy of Science and Technology Hanoi Vietnam
3. Faculty of Chemistry Hanoi National University of Education Hanoi Vietnam
4. Institute of Environmental Sciences Nguyen Tat Thanh University Ho Chi Minh City Vietnam
5. Thai Nguyen University of Agriculture and Forestry Thai Nguyen Vietnam
6. Vietnam Military Medical University Hanoi Vietnam