Erratum: Serum, saliva, and GCF concentration of RANKL and osteoprotegerin in smokers versus nonsmokers with chronic periodontitis

In the article titled, “Serum, saliva, and GCF concentration of RANKL and osteoprotegerin in smokers versus nonsmokers with chronic periodontitis”, published in elocation ID 80, vol. 5 of Advanced Biomedical Research,[1] the sentences under the subheadings “Results” and “Conclusions” in the Abstract section are incorrectly written. The correct sentences are as following:

“Results: RANKL and OPG concentrations in saliva, serum, and GCF did not show any significant difference among all groups. The salivary RANKL/OPG ratio was higher in nonsmokers with periodontitis in comparison with smoker periodontitis patients (P > 0.05). Both CP groups had significantly lower serum RANKL concentrations than the healthy controls (P < 0.05).

Conclusions: According to limitations of this study, it may be concluded that smoking does not affect bone resorption via the RANKL-OPG system.”