1. Faculty of Pharmacy, Hue University of Medicine and Pharmacy, Hue University, Hue City, Vietnam
2. Phong Dien Nature Reserve, Phong Dien, Thua Thien Hue, Vietnam
3. Faculty of Forestry, Hue University of Agriculture and Forestry, Hue University, Hue City, Vietnam
4. Mien Trung Institute for Scientific Research, Vietnam National Museum of Nature (VAST), Hanoi, Thua Thien Hue, Vietnam
5. University Road, Aleku Area, Osogbo, Nigeria