2) Kasai N, Fukushima K, Omori K, et al: Effects of early identification and intervention on language development in Japanese children with prelingual severe to profound hearing impairment. Ann Otol Rhinol Laryngol Suppl 2012; 202: 16-20.
5) Newborn and infant hearing screening. Current issues and guiding principles for action. http: //www.who.int/blindness/publications/Newborn_and_Infant_Hearing_Screening_Report.pdf#search=%27WHO+hearing+screening%27