_:vb50939501 . _:vb50939501 . _:vb50939501 "A chromosomal duplication syndrome characterized by hypotonia, failure to thrive, mental retardation, pervasive developmental disorders and congenital anomalies that has_material_basis_in duplication of a region of chromosome 17p11.2."^^ . _:vb50939501 . _:vb50939501 "url:https://www.ncbi.nlm.nih.gov/pubmed/10615134"^^ . _:vb50939501 . _:vb50939501 "url:https://www.ncbi.nlm.nih.gov/pubmed/20425816"^^ . _:vb50939501 .