Gemcitabine-carboplatin (GC)  Identification of two biomarkers (formate and acetate) that can predict a positive response in MBC (metastatic breast cancer) patients treated with GC chemotherapy.  1H-NMR CPMG1H JRES1H,1H-COSY1H,1H-TOCSY1H,13C-HSQC1H,13C-HMBC  [137]