Jerusalem, G., Farah, S., Abdi, E., Kamby, C., Thompson, A., Loibl, S., Gavilá, J., Kuroi, K., Marth, C., Müller, B., O'Reilly, S., Gombos, A., Courtois, A., Ruhstaller, T., Burstein, HJ, Rabaglio, M., Ruepp, B, Ribi, K, Viale, G, Gelber, RD, Coates, AS, Loi, S, Goldhirsch, A, Chirgwin, J., Regan, MM, Colleoni, M, Aebi, S., Karlsson, P., Neven, P., Hitre, E., Graas, M. P., Simoncini, E.. Elsevier; 2021. Continuous versus intermittent extended adjuvant letrozole for breast cancer: final results of randomized phase III SOLE (Study of Letrozole Extension) and SOLE Estrogen Substudy.