[Prolonged asymptomatic presence of a foreign body in the retropharyngeal space].

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@article{Ashmarin2003ProlongedAP, title={[Prolonged asymptomatic presence of a foreign body in the retropharyngeal space].}, author={M P Ashmarin and V I Karachkin and O M Ashmarin}, journal={Vestnik otorinolaringologii}, year={2003}, volume={1}, pages={55} }