1. National Institute of Hygiene and Epidemiology, Medical Entomology and Zoology Department, Hai Ba Trung, Hanoi 100000, Vietnam
2. U.S. Naval Medical Research Unit TWO, Singapore
3. Vysnova Partners Inc., Landover, MD, USA
4. Department of Entomology, Natural Museum of Natural History, Smithsonian Institution, Museum Support Center, Suitland, MD, USA