Predictive Value of Serum Carbohydrate Antigen 19-9 (CA19-9) for Early Mortality in Advanced Pancreatic CancerUsón Junior, Pedro L. S.; Callegaro-Filho, Donato; Bugano, Diogo D. G.; Moura, Fernando; Maluf, Fernando C. · Journal of Gastrointestinal Cancer · 2017