1. Faculty of Forestry, Hue University of Agriculture and Forestry, Hue University, Hue City, Vietnam
2. Phong Dien Nature Reserve, Phong Dien, Vietnam
3. Faculty of Agronomy, Hue University of Agriculture and Forestry, Hue University, Hue City, Vietnam
4. Faculty of Pharmacy, Hue University of Medicine and Pharmacy, Hue University, Hue City, Vietnam
5. University Road, Aleku Area, Osogbo, Nigeria