Clustering of anophthalmia and microphthalmia. No clustering has been found-but a link seems to exist with population density.
Mariman
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EC
D000853:Anophthalmos / Q000453:epidemiology*; D016000:Cluster Analysis; D004739:England / Q000453:epidemiology; D006801:Humans; D008850:Microphthalmos / Q000453:epidemiology*; D011156:Population Density