1. Department of Parasitology, Faculty of Medicine Siriraj Hospital, Bangkok, Thailand.
2. Department of Parasitology, Faculty of Public Health, Bangkok, Thailand.
3. Department of Pathology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, Thailand.
4. Filaria Project, Phikulthong Royal Development Study Center, Narathiwatt Province, Thailand.
5. Department of Microbiology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.