Cleft palate showed a decreasing trend from 7.04 to 0.87 per 10,000 live births during the first decade and slightly increased to 2–3 per 10,000 live births after that (Overall reduction, chi-squared: 34.837, P <0.05).
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Orofacial Clefts in High Prevalence Area of Birth Defects - Five Counties, Shanxi Province, China, 2000-2020.
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