Original Article

Spatial Distribution of Orofacial Cleft Defect Births in Harris County, Texas, 1990 to 1994, and Historical Evidence for the Presence of Low-level Radioactivity in Tap Water

Background: While both ionizing and nonionizing radiation are known to impair human reproductive capacity, the role of low-level domestic radiation continues to be an unsettled issue. Objectives: We examined the geostatistical distribution (residential longitude and latitude) of orofacial cleft birth cases adjusted for the underlying population distribution. Furthermore, we examined…