Zhang J, Zhang H, Zhao L, Gu J, Feng Y, An H. J Pain Res. 2018;11:3061– 3070. Correction for “Population pharmacokinetic modeling of flurbiprofen, the active metabolite of flurbiprofen axetil, in Chinese patients with postoperative pain” Zhang J, Zhang H, Zhao L, Gu J, Feng Y, An H. Journal of Pain Research. 2018;11:3061– 3070.The above article published in the Journal of Pain Research was under investigation for allegedly reporting results from an unrelated study using an unrelated clinical trial registration (CTR) number. We previously published an Expression of Concern to highlight this to readers while we completed our investigation:Zhang J, Zhang H, Zhao L, Gu J, Feng Y, An H. Journal of Pain Research. 2019;12:2799. https://doi.org/10.2147/JPR. S231531. Read the original article