1. Chan CT (1985) Enterobiasis among schoolchildren in Macao. Southeast Asian J Trop Med Public Health 16:549–553
2. Chang JH, Huang WH, Chen ER, Hu SC (1990) Survey of Enterobius vermicularis infection among schoolchildren in Tainan city. Kaohsiung J Med Sci 6:587–593
3. Chih HW, Lin HS, Tang KS, Cheu SC (1996) A study of multiple factors to Enterobius vermicularis infection among pre-school children in Ta-Liao district of Kaohsiung County. Kaohsiung J Med Sci 12:538–543
4. Health Protection Inspectorate (1998) Communicable disease statistics in Estonia. Part 4. Tervisekaitseinspektsioon, Tallinn
5. Health Protection Inspectorate (2000) Communicable disease statistics in Estonia. Part 9. Tervisekaitseinspektsioon, Tallinn