`A 2-week, multicenter, randomized, double-blind, double-dummy, add-on study of the effects of titration on tolerability of tramadol/acetaminophen combination tablet in Korean adults with knee osteoarthritis pain`
Chan-Bum, C, Song, JS, Kim, TH, Kang, YM, Suh, CH, 이종태, Bae, SC, Lee, J, Choe, JY, Lee, CK, 지종대
CLINICAL THERAPEUTICS, 200707