Endoscopic ultrasonography-guided fine-needle aspiration biopsy: A safe method for accurate diagnosis

Kenji Okubo, Kenji Yamao, Akira Sawaki, Masahiro Tajika, Hiroki Kawai, Masaki Katsurahara, Toshihumi Isaka, Hiroshi Imaoka, Yasuyuki Okamoto, Reiko Suto