References
1. World Health Organization. ICD-9-CM: International Classfication of Diseases. Geneva, Switzerland: WHO; 2006.
2. Coleman JR Jr, Sykes JM. The embryology, classification, epidemiology, and genetics of facial clefting. Facial Plast Surg Clin North Am 2001;9:1–13.
3. James WH. Are oral clefts a consequence of maternal hormone imbalance? Evidence from the sex ratios of sibs of probands. Teratology 2000;62:342–345.
4. Felix TM, Hanshaw BC, Mueller R, et al. CHD7 gene and non-syndromic cleft lip and palate. Am J Med Gene A 2006;140:2110–2114.
5. Jakobsen LP, Knudsen MA, Lespinasse J, et al. The genetic basis of the Pierre Robin sequence. Cleft Palate Craniofacial J 2006;43:155–159.
6. Nie X, Luukko K, Kettunen P. FGF signaling in craniofacial development and developmental disorders. Oral Dis 2006;12:102–111.
7. Prescott NJ, Winter RM, Malcolm S. Maternal MTHFR genotype contributes to the risk of non-syndromic cleft lip and palate. J Med Genet 2002;39:368–369.
8. Fallin MD, Hetmanski JB, Park J, et al. Family-based analysis of MSX1 haplotypes for association with oral clefts. Genet Epidemiol 2003;25:168–175.
9. Murray JC, Schutte BC. Cleft palate: players, pathways, and pursuits. J Clin Invest 2004;113:1676–1678.
10. Owens JR, Jones JW, Harris F. Epidemiology of facial clefting. Arch Dis Child 1985;60:521–524.
11. Wyszynski DF, Nambisan M, Surve T, et al. Increased rate of major malformations in offspring exposed to valproate during pregnancy. Neurology 2005;64:961–965.
12. Medina-Carrilo L, Rivas-Solis F, Fernández-Argüelles R. Risk for congenital malformations in pregnant women exposed to pesticides in the state of Nayarit, Mexico. Ginecol Obstet Mex2002;70:538–544.
14. Prescott NJ, Winter RM, Malcolm S. Nonsyndromic cleft lip and palate: complex genetics and environmental effects. Ann Hum Genet 2001;65:505–515.
15. Murray JC. Gene/environment causes of cleft lip and/or palate. Clin Genetics 2002;61:248–256.
16. Shaw GM, Wasserman CR, Lammer EJ, et al. Orofacial clefts, parental cigarette smoking, and transforming growth factor-alpha gene variants. Am J Hum Genet 1996;58:551–561.
17. Lammer EJ, Shaw GM, Iovannisci DM, et al. Maternal smoking and the risk of orofacial clefts: susceptibility with NAT 1 and NAT 2 polymorphisms. Epidemiology 2004;15:150–156.
18. van Rooij IA, Wegerif MJ, Roelofs HM, et al. Smoking, genetic polymorphisms in bio-transformation enzymes, and nonsyndromic oral clefting: a gene-environment Interaction. Epidemiology 2001;12:502–507.
19. Zeiger JS, Beaty TH, Liang KY. Oral clefts, maternal smoking, and TGFA: a meta-analysis of gene-environment interaction. Cleft Palate Craniofac J 2005;42:58–63.
20. Hwang SJ, Beaty TH, Panny SR, et al. Association study of transforming growth factor alpha (TGF alpha) TaqI polymorphism and oral clefts: indication of gene-environment interaction in a population-based sample of infants with birth defects. Am J Epidemiol 1995;141:629–636.
21. Christensen K, Olsen J, Norgaard-Pedersen B, et al. Oral clefts, transforming growth factor alpha, gene variants, and maternal smoking: a population-based case-control study in Denmark, 1990-1994. Am J Epidemiol 1999;149:248–255.
22. Krapels IP, van Rooij IA, Ocke MC, et al. Maternal dietary B vitamin intake, other than folate, and the association with orofacial cleft in the offspring. Eur J Nutr 2004;43:7–14.
23. van Rooij IA, Swinkel DN, Bloom HJ, et al. Vitamin and homocysteine status of mothers and infants and risk of nonsyndromic orofacial clefts. Am J Obstet Gynecol 2003;189:1155–1160.
24. van Rooij IA, Groenen PM, van Drongelen M, et al. Orofacial cleft and spina bifida: N-acetylthransferase phenotype, maternal smoking, and medication use. Theratology 2002;66:260–266.
25. Prescott NJ, Malcolm S. Folate and the face: evaluating evidence for the influence of folate genes on craniofacial development. Cleft Palate Craniofacial J 2002;39:327–331.
26. Womersley J, Stone DH. Epidemiology of facial clefts. Arch Dis Child 1987;62:717–720.
27. Brent RL, Beckman DA. The contribution of environmental teratogens to embryonic and fetal loss. Clin Obstet Gynecol 1994;37:646–670.
28. Nomura T. X-ray- and chemically induced germ-line mutation causing phenotypical anomalies in mice. Mutat Res 1988;198:309–320.
29. Brent RL. Radiation teratogenesis teratogen update. In: Brent RL, editor. Environmentally Induced Birth Defect Risks. New York, New York: Alan R Liss; 1986; pp. 145–163.
30. Källén B, Karlsson P, Lundell M, et al. Outcome of reproduction in women irradiated for skin hemangioma in infancy. Radiat Res 1998;149:202–208.
31. Ritenour ER. Health effects of low level radiation: carcinogenesis, teratogenesis, and mutagenesis. Semin Nucl Med 1986;16:106–117.
32. Zieglowski V, Hemprich A. Facial cleft birth rate in former East Germany before and after the reactor accident in Chernobyl. Mund Kiefer Gesichtschir 1999;3:195–199.
33. Yamazaki JN, Wright SW, Wright PM. A study of the outcome of pregnancy in women exposed to the atomic bomb blast in Nagasaki. J Cell Physiol Suppl 1954;43:319–328.
34. Sulik KK, Cook CS, Webster WS. Teratogens and craniofacial malformations: relationships to cell death. Development 1988;103:213–231.
35. Scherb H, Weigelt E. Cleft lip and cleft palate birth rate in Bavaria before and after the Chernobyl nuclear power plant accident. Mund Kiefer Gesichtschir 2004;8:106–110.
36. Rugh R. Effects of Ionizing Radiations, Including Radioisotopes, on the Placenta and Embryo. Birth Defects Original Article Series. New York: The National Foundation-March of Dimes; 1965.
37. Purnell SJ, Allen JE, Oyedepo AC, et al. Fetal dosimetry from natural alpha-particle emitters. Radiat Res 1999;152:S133–S136.
38. Persaud TVN. Environmental Causes of Human Birth Defects. Springfield, IL: Charles C. Thomas; 1990.
39. Kendall GM, Smith TJ. Doses from radon and its decay products to children. J Radiol Prot 2005;25:241–256.
40. Joss R, Brunner K. Pregnancy following tumor therapy. Schweiz Med Wochenschr 1979;109:904–907.
41. Risk estimation for multifactorial diseases: a report of the International Commission on Radiological Protection. Ann ICRP 1999;29:1–144.
42. Gentry JT, Parkhurst E, Bulin GV Jr. An epidemiological study of congenital malformations in New York State. Am J Public Health 1959;49:497–513.
43. Centers for Disease Control and Prevention. Second National Report on Human Exposure to Environmental Chemicals: Uranium. In: NCEH Pub. No. 02-0716. Atlanta, GA; 2003; pp. 23–25.
44. Shoji S, Watanabe H, Katoh O, et al. Developmental malformations and intrauterine deaths in gamma-ray-irradiated scid mouse embryos. Int J Radiat Biol 1998;73:705–709.
45. Beebe GW. Ionizing radiation and health. Am Sci 1982;70:35–44.
46. Bladen CL, Dynan WS, Kozlowski DJ. Low dose radiation damage and radioprotection in the vertebrate embryo.Office of Biological and Environmental Research, DOE Low-dose Radiation Program Workshop IV. Available at:
http://www.lowdose.energy.gov.Accessed March 31, 2007.
47. Brent RL, Gorson RO. Radiation exposure during pregnancy. Curr Probl Diagn Radio 1972;2:1–48.
48. Arfsten DP, Still KR, Ritchie GD. A review of the effects of uranium and depleted uranium exposure on reproduction and fetal development. Toxicol Ind Health 2001;17:180–191.
49. Brock JD. Radioactivity of drinking water in northwest Harris County. Houston, Texas: Master Thesis, University of Texas Health Science Center at Houston School of Public Health; 1984.
50. Cech I. Assessment of radium and radon in water. Geol Soc Am Bull 1987;29:8–9.
51. Cech I, Lemma M, Prichard HM, et al. Radium-226 and radon-222 in domestic water of Houston-Harris County, Texas. In: Barbara G, editor. Radon, Radium, and Other Radioactivity in Ground Water: Hydrologic Impact and Application to Indoor Airborne Contamination, Proceedings of the National Water Well Association Conference in Somerset, New Jersey. Chelsea, MI: Lewis Publishers; 1987; pp. 377–402.
52. Cech I, Kreitler CH, Prichard H, et al. Radon distribution in domestic water of Texas. Ground Water 1988;26:561–569.
53. Cech I, Lemma M, Kreitler CW, et al. Radium and radon in water supplies from the Texas gulf coastal aquifer. Water Res 1988;22:109–121.
54. Cech I, Prichard HM, Mayerson A, et al. Pattern of distribution of radium 226 in drinking water of Texas. Water Resources Research 1987;23:1987–1995.
55. Cech I, Siegle P, Merritt M. Toward a better understanding of the geographic distribution of radon in domestic water supplies. In: Pawlowski L, editor. Proc of Conference Chemistry for the Protection of the Environment. Lublin, Poland: United States Department of Energy/United States Environmental Protection Agency; 1992; pp. 201–213.
56. United States Environmental Protection Agency. National Primary Drinking Water Regulations; Radionuclides; Final Rule. In: Vol 65: Federal Register. December 7, 2000; pp. 76707–76753. Available at:
http://www.epa.gov/safewater/rads/radfr.html. Accessed March 31, 2007.
57. MapInfo Corporation. StreetInfo, Texas West, Enhanced Address Layer, version 7.0. Troy, NY; 2003.
58. MapInfo Corporation. MapInfo, Version 8. Troy, NJ; 2004.
59. Kuldorff M. Information Management Services I. SaTScan v 3.0.5. Software for the spatial and space-time scan statistics. Bethesda, MD: National Cancer Institute; 2002.
60. United States Environmental Protection Agency. Proposed Radon in Drinking Water Rule. In: 64 Federal Register 59246, 59328; November 2, 1999.
61. Spritz RA. The genetics and epigenetics of orofacial clefts. Curr Opin Pediatr 2001;13:556–560.
62. Katy Area Chamber of Commerce. Katy Business, Katy Community and Relocation to Katy, Texas; 2003.
63. Burg JAR. Letter to residents. Atlanta, Georgia: Department of Health and Human Services, Agency for Toxic Substances and Disease Registry; 1991.
64. Burg JAR. Letter to physicians. Atlanta, Georgia: Department of Health and Human Services Agency for Toxic Substances and Disease Registry 1991.
65. Dixon R. Toxic response of reproductive system. In: Doull J, editor. Casarett and Doull's Toxicology: The Basic Science of Poisons. New York: McGraw-Hill, Health Professions Division; 1995; pp. 432–477.
66. Miller RW. Measures of reproductive effects. Chemical and radiation hazards to children. In: Report of the 84th Ross Conference on Pediatric Research. Columbus, OH: Ross Laboratories; 1982; pp. 85–89.
67. Polednak AP, Stehney AF, Rowland RE. Mortality among women first employed before 1930 in the United States radium dial-painting industry: a group ascertained from employment lists. Am J Epidemiol 1978;107:179–195.
68. Mays CW, Spiess H. Bone tumors in thorotrast patients. Environ Res 1979;18:88–93.
69. Mays CW, Spiess H. Bone sarcoma in patients given radium-224. In: Boice JD, Fraumeni JF Jr (eds). Radiation Carcinogenesis, Epidemiology and Biological Significance. New York, Raven Press, 1984, pp 241–252.
70. Mays CW, Van Dilla MA, Floyd RL, et al. Radon retention in radium-injected beagles. Radiat Res 1958;8:480–489.
71. Marengo L. Comparison of Texas Birth Defect Registry and Texas Vital Record Data for Selected Birth Defects Readily Diagnosed at Delivery. Austin, TX: Texas Birth Defect Epidemiology and Surveillance Branch, Department of State Health Services; 2004.
72. Texas Commission on Environmental Quality. Drinking water quality records. Austin, TX; 2006.
74. Harris County Municipal Utility District 261. Facts surrounding recent developments. Letter to all district constituents. June 11, 2004.
75. Cech I, Burau K, Al-Hashimi R, et al. Chemical and Biological Risk Factors in the Etiology of Neural Tube Birth Defects Near the U.S.-Mexico Border, Final Report to CDC/ATSDR, December 2006.