Distinct immunological features of oropharyngeal cancer peritumoral tonsillar tissues from inflammatory tonsils and regional lymph nodes: A pilot study - Naohiro Wakisaka; Makiko Moriyama-Kita; Satoru Kondo; Eiji Kobayashi; Takayoshi Ueno; Yosuke Nakanishi; Kazuhira Endo; Hisashi Sugimoto; Tomokazu Yoshizaki (PLoS ONE)