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Dong Hyun Cha, Junnam Lee, Young-Joo Jeon, Yong Wook Jung, Ja-Hyun Jang, Taeheon Lee, Eun Hae Cho. "A case of maternal uniparental disomy of chromosome 20 detected by noninvasive prenatal test of 1,000 high-risk pregnancies." Journal of Genetic Medicine 14.1 (2017) 31-33