Randomized open-label non-inferiority trial of paracetamol or celecoxib for patients with chronic low back pain

K Kazuhiro Hayashi K Kenji Miki H Hiroshi Ueno (Department of Applied Chemistry, Graduate School of Engineering) M Miho Sekiguchi Y Young-Chang Arai T Takuya Nikaido Y Yasuhiro Shiga M Masayuki Inoue (Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan) H Hideki Kataoka Y Yuya Kawarai Y Yoshiyuki Kimura K Keisuke Shimizu K Kazuhiro Shimo Y Yukiko Shiro K Katsuyoshi Tanaka S So Tanaka Y Yoshiyuki Hirakawa K Kousei Miura M Masao Yukioka