The combined chemotherapy consisted of gemcitabine 1 g/m2 ( 30 min ) , 5-FU 750 mg/m2 ( 24 h ) , folinic acid 200 mg/m2 ( 30 min ) , and Cisplatin 30 mg/m2 ( 90 min ) on day 1 and 8 ; q3w for the first 12 weeks ( GFFC ) followed by gemcitabine alone in patients without cancer progression .