- Activity of exemestane in metastatic breast cancer after failure of nonsteroidal aromatase inhibitors: a phase II trial. Lønning, P.E., Bajetta, E., Murray, R., Tubiana-Hulin, M., Eisenberg, P.D., Mickiewicz, E., Celio, L., Pitt, P., Mita, M., Aaronson, N.K., Fowst, C., Arkhipov, A., di Salle, E., Polli, A., Massimini, G. J. Clin. Oncol. (2000)