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APA Citation
Moratin, J., Metzger, K., Kansy, K., Ristow, O., Engel, M., Hoffmann, J., Flechtenmacher, C., Freier, K., Freudlsperger, C., & Horn, D. (n.d.). the prognostic significance of the lymph node ratio in oral cancer differs for anatomical subsites. International journal of oral & maxillofacial surgery, 49(5), 558–563. http://access.bl.uk/ark:/81055/vdc_100104361178.0x000027