1. World health organization- https://www.who.int/news-room/fact-sheets/detail/deafness-and-hearing-loss
2. Joint Committee on Infant Hearing (JCIH) (1995) Year 1994 position statement. Pediatrics 95(1): 152–156
3. Universal neonatal hearing screening- https://en.wikipedia.org/wiki/Universal_neonatal_hearing_screening
4. Farhat AS, Ghasemi MM, Akhondian J, Mohamadzadeh A, Esmaeili H, Amiri R et al (2014) Assessment of the prevalence of hearing impairment in neonates born in Imam Reza, Ghaem and OM-Albanin Hospitals of Mashhad. Iran J Neonatol 5(2):17–20
5. Vashistha I, Aseri Y, Singh BK et al (2016) Prevalence of hearing impairment in high risk infants. Indian J Otolaryngol Head Neck Surg 68:214