_:vb50948138 . _:vb50948138 "url:http://www.ninds.nih.gov/disorders/rett/detail_rett.htm"^^ . _:vb50948138 . _:vb50948138 "url:http://www.nichd.nih.gov/health/topics/rett_syndrome.cfm"^^ . _:vb50948138 "url:https://medlineplus.gov/ency/article/001536.htm"^^ . _:vb50948138 "A pervasive developmental disease that is characterized by normal early growth and development followed by a slowing of development, loss of purposeful use of the hands, distinctive hand movements, slowed brain and head growth, problems with walking, seizures, and intellectual disability."^^ . _:vb50948138 . _:vb50948138 . _:vb50948138 .