Varchetta, S., N. Gibelli, et al., Elements related to heterogeneity of antibody -dependent cell cytotoxicity in patients under trastuzumab therapy for primary operable breast cancer overexpressing Her2 . Cancer Res, 2007. 67(24): p. 11991 -9. 7866/135 08/23/2021 Page 29 of 39 23.