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http://journals.cambridge.org/action/displayAbstract?aid=1080272
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S. Lokman,
A. Sani
and D. S. Sidek
(1993).
Pyopneumothorax—a rare sequelae of retropharyngeal abscess. The Journal of Laryngology & Otology, 107
,
pp 460-462
doi:10.1017/S002221510012345X