Erratum to: To the article “In Vitro Effect of Knotolan, a New Lignan from Abies sibirica, on the Growth of Hormone-Dependent Breast Cancer Cells” by O. S. Zhukova, L. V. Fetisova, A. V. Trishin, N. Yu. Anisimova, A. E. Shcherbakov, D. V. Yashunskii, D. E. Tsvetkov, V. M. Men’shov, M. V. Kiselevskii and N. E. Nifant’ev, Vol. 149, No. 4, pp. 511–514, October, 2010