After publication of this work [1], we noted that we inadvertently failed to include the complete list of all coauthors. The full list of all authors has now been added and the Authors' contributions and Competing interests section modified accordingly.
Competing interests
The authors declare that they have no competing interests.
Authors' contributions
SKT conceived of the study and participated in its design and coordination. EM performed the cytogenetic studies and participated in its design and coordination. ML and MK participated in the cytogenetic analysis. NK, EE and AW participated in the molecular cytogenetic analysis. AG performed the ultrasonography of the pregnant woman. SO and KA performed the molecular analysis for uniparental disomy. TL was responsible for the molecular cytogenetic studies and participated in the drafting of the manuscript. AM participated in the design and coordination of the study and participated in the drafting of the manuscript. All authors read and approved the final manuscript.