Cyclooxygenase-1, but not -2, is upregulated in NB4 leukemic cells and human primary promyelocytic blasts during differentiation. - Rocca, B.; Morosetti, R.; Habib, A.; Maggiano, N.; Zassadowski, F.; Ciabattoni, G.; Chomienne, C.; Papp, B.; Ranelletti, F. O. (Leukemia (08876924), 2004)