Single Intradiscal Administration of the Tumor Necrosis Factor-Alpha Inhibitor, Etanercept, for Patients with Discogenic Low Back Pain. - Takeshi Sainoh; Sumihisa Orita; Masayuki Miyagi; Gen Inoue; Hiroto Kamoda; Tetsuhiro Ishikawa; Kazuyo Yamauchi; Miyako Suzuki; Yoshihiro Sakuma; Go Kubota; Yasuhiro Oikawa; Kazuhide Inage; et al. (Pain Medicine, 2016)