1. Department of Medical Entomology, Faculty of Tropical Medicine; Mahidol University; Bangkok; Thailand
2. Department of Parasitology, Faculty of Medicine; Chiang Mai University; Chiang Mai; Thailand
3. Mahidol Vivax Research Center, Department of Tropical Medicine; Mahidol University; Bangkok; Thailand
4. Department of Parasitology and Community Health, Faculty of Medical Technology; Mahidol University; Bangkok; Thailand
5. Department of Entomology; University of Wisconsin; Madison; Wisconsin