Phase II Trial of Sorafenib in Patients with Chemotherapy Refractory Metastatic Esophageal and Gastroesophageal (GE) Junction Cancer. oleh Yelena Y Janjigian, Efsevia Vakiani, Geoffrey Y Ku, Jessica M Herrera, Laura H Tang, Nancy Bouvier, Agnès Viale, Nicholas D Socci, Marinela Capanu, Michael Berger, David H Ilson