Flores-Guevara, Roberto Usher syndrome type 1: early detection of electroretinographic changes. [electronic resource] - European journal of paediatric neurology : EJPN : official journal of the European Paediatric Neurology Society Nov 2009 - 505-7 p. digital Publication Type: Journal Article ISSN: 1532-2130 Standard No.: 10.1016/j.ejpn.2008.10.002 doi Subjects--Topical Terms: ChildChild, PreschoolElectroencephalographyFemaleHumansInfantMaleReaction Time--physiologyRetrospective StudiesUsher Syndromes--diagnosis