- A safety run-in phase aiming to evaluate the safety of the proposed combination AZD2014 + anastrozole (Arm A) versus anastrozole alone (Arm B). No dose escalation is scheduled (doses are based on maximum tolerated dose (MTD) defined for AZD2014 and the summary of product characteristics (SPC) of anastrozole). However, dose de-escalation for AZD2014 will be applied in case of toxicity.