Phase II study of trifluridine/tipiracil in metastatic breast cancers with or without prior exposure to fluoropyrimidines. - Lim JSJ; Ow SGW; Wong ALA; Lee MXW; Chan GHJ; Low JL; Sundar R; Choo JRE; Chong WQ; Ang YLE; Tai BC; Lee SC (European journal of cancer (Oxford, England : 1990), 2023)