1113P Post hoc survival outcomes based on initial and subsequent treatment in patients (pts) with mismatch repair proficient/microsatellite stable (MMRp/MSS) primary advanced or recurrent endometrial cancer (pA/R EC) in the ENGOT-EN6-NSGO/GOG-3031/RUBY trial - Powell, M.A.; Roed, H.; Gilbert, L.; Zub, O.; McCourt, C.; Fleming, E.; Angioli, R.; Cloven, N.; Denschlag, D.; Pennington, K.; Auranen, A.; Sawyer, B.; et al. (Annals of Oncology, 2025)