3Takahashi H, Hongio J, Fujita A, et al. Transtympanic endoscope findings in patients with otitis media with effusion Arch Otolaryngol[J]. Head Neck Sury, 1990, 116(10):1186- 1189.
4Robinson PM. Prognostic factors in otitis media with effusion[J]. J Larynogol Otol, 1988, 102(8) :989 - 991.
5Amstrong BW. Prolonged middler ear ventilation; the right tube in the right place [ J ]. Ann Otolrhinal Laryngol, 1983, 92 ( 5 ) : 582 -585.
6Amstrong BW. Prolonged middler ear ventilation: the right in the right place[J]. Ann Otolrhinal Laryngol, 1983, 92(5) : 582 - 585.