Retraction: Yu, X., Hu, Y., Freire, M., Yu, P., Kawai, T., Han X. (2017) Role of toll‐like receptor 2 in inflammation and alveolar bone loss in experimental peri‐implantitis versus periodontitis. Journal of Periodontal Research 53(1), 98‐106. https://doi.org/10.1111/jre.12492 - Retraction Notice | RetractBase