Study of Ruxolitinib in Pancreatic Cancer Patients

Capecitabine starting dose - 2000 mg/m\^2 (1000 mg/m\^2 twice a day (BID)) (NOTE: Frequency of administration may be adjusted during the study.)

Ruxolitinib starting dose - 15 mg BID (NOTE: Starting dose of randomized study drug may be 10 mg BID based on results from safety run-in study. Dose of ruxolitinib may be increased during randomized study.)

Placebo matching ruxolitinib