Cummings, SR;Ettinger, B;Delmas, PD;Kenemans, P;Stathopoulos, V;Verweij, P;Mol-Arts, M;Kloosterboer, L;Mosca, L;Christiansen, C;Bilezikian, J;Kerzberg, EM;Johnson, S;Zanchetta, J;Grobbee, DE;Seifert, W;Eastell, R.The effects of tibolone in older postmenopausal women..N Engl J Med.2008.359.7.697-708