To the Editor,We would like to thank the authors of the letter for their interest and criticism about our study entitled “Association of mitral annular calcification with endothelial dysfunction, carotid intima-media thickness, and serum fetuin-A: An observational study,” published in the December issue of Anatolian J Cardiol 2013; 13: 752-8 (1).We re-examined our results retrospectively. During the biochemical analysis, the diagnostic range of our spectrophotometry data was not available. For this reason, our blood samples were diluted in a higher percentage.The differences of the results between our study and some other articles may possibly be the consequence of the dilution ratios of our spectrophotometry values.We indicated the normal value of fetuin-A in our article. However, the aim of our study was to compare fetuin-A levels between the two groups.