Veselina Goranova-Marinova, Stefan Goranov, Pavel Pavlov, Todorka Tzvetkova. Serum levels of OPG, RANKL and RANKL/OPG ratios in newly-diagnosed patients with multiple myeloma. Clinical correlations. Haematologica 2007;92(7):1000-1001; https://doi.org/10.3324/haematol.10943.