@article{langner_del negro_akashi_araújo_tincani_martins_2007,  title={Schwannomas in the head and neck: retrospective analysis of 21 patients and review of the literature},  volume={125},  ISSN={1516-3180},  url={https://doi.org/10.1590/S1516-31802007000400005},  DOI={10.1590/S1516-31802007000400005},  number={4},  journal={Sao Paulo Medical Journal},  publisher={Associação Paulista de Medicina - APM},  author={Langner, Erwin and Del Negro, André and Akashi, Hugo Kenzo and Araújo, Priscila Pereira Costa and Tincani, Alfio José and Martins, Antonio Santos},  year={2007},  month={Jul},  pages={220–222} }