1. Kraemer JK, Richardson MA, Weis NS, Furukawa CT, Shapiro GG, Pierson WE, et al. Risk factors for persistent middle-ear effusions. JAMA. 1983;249:1022–5.
2. Pukander J, Karma P. Persistence of middle-ear effusion and its risk factors after an acute attack of otitis media with effusion. In: Lim DJ, Bluestone CD, Klein JO, Nelson JD, editors. Recent advances in otitis media. Proceedings of the fourth international symposium. Toronto: BC Decker; 1988, p. 8–11.
3. Bernstein JM, Lee J, Conboy K, Ellis E, Li P. The role of IgE mediated hypersensitivity in recurrent otitis media with effusion. Am J Otol. 1983;5:66–9.
4. MacIntyre EA, Karr CJ, Koehoorn M, et al. Otitis media incidence and risk factors in a population-based birth cohort. Paediatr Child Health. 2010;15:437–42.
5. Pukander J, Luotonem J, Timonen M, Karma P. Risk factors affecting the occurrence of acute otitis media among 2-3 year-old urban children. Acta Otolaryngol. 1985;100:260–5.