Basic Fibroblast Growth Factor Induces Matrix Metalloproteinase-13 via ERK MAP Kinase-Altered Phosphorylation and Sumoylation of Elk-1 in Human Adult Articular Chondrocytes [Expression of Concern]

Sampen HJI, Sharrocks AD, Lin X, et al. Open Access Rheumatol. 2009;1:151-161. We, the Editor and Publisher of the journal Open Access Rheumatology: Research and Reviews are issuing an expression of concern for the published article. Following publication, questions about the scientific integrity of the article were brought to the Publisher and Editors' attention. We reached out to the corresponding author who has been cooperative and as we continue to work through the issues raised, we advise readers to interpret the information presented in the article with due caution. The corresponding author has been notified about this Expression of Concern.