619PD_PRInfluence of sex on chemotherapy efficacy and toxicity in oesophagogastric (OG) cancer: A pooled analysis of four randomised trials. (23rd October 2018) - Davidson, M; Wagner, A D; Kouvelakis, K; Starling, N; Chau, I; Watkins, D; Rao, S; Peckitt, C; Cunningham, D