References
- Martin J AM, Bentzen O, Colley J RT, et al. Childhood deafness in the European community. Scand Audiol. 1981; 10: 165–74
- Sehlin P, Holmgren G, Zakrisson J. Incidence, prevalence and etiology of hearing impairment in children in the county of Vasterbotten, Sweden. Scand Audiol. 1990; 19: 193–200
- Axelsson A, Aniansson G, Costa O. Hearing loss in school children. Scand Audiol. 1987; 16: 137–43
- Marttila TI. Results of audiometrical screening in Finnish schoolchildren. Int J Pediatr Otorhinolaryngol. 1986; 11: 39–46
- Sorri M, Rantakallio P. Prevalence of hearing loss at the age of 15 in a birth cohort of 12,000 children from northern Finland. Scand Audiol. 1985; 14: 203–7
- Hartikainen-Sorri A-L, Rantakallio P, et al. Changes in prognosis of twin births over 20 years. Ann Med. 1990; 22: 131–5
- Liu X, Xu L. Nonsyndromic hearing loss: an analysis of audiograms. Ann Otol Rhinol Laryngol. 1994; 103: 428–33
- Brookhouser P E, Worthington D W, et al. Unilateral hearing loss in children. Laryngoscope. 1991; 101: 1264–72