Overexpression of Semaphorin 3A is a Marker Associated with Poor Prognosis in Patients with Nasopharyngeal Carcinoma oleh Tomoko Imoto, Satoru Kondo, Naohiro Wakisaka, Pham Tahnh Hai, Noriko Seishima, Makoto Kano, Takayoshi Ueno, Harue Mizokami, Yosuke Nakanishi, Miyako Hatano, Kazuhira Endo, Hisashi Sugimoto, Makiko Moriyama-Kita, Tomokazu Yoshizaki