Distant Lymph Node Metastases in Esophageal Cancer: Impact of Endoscopic Ultrasound-Guided Biopsy - Giovannini, M.; Monges, G.; Seitz, J. F.; Moutardier, V.; Bernardini, D.; Thomas, P.; Houvenaeghel, G.; Delpero, J. R.; Giudicelli, R.; Fuentes, P. (Endoscopy, 1999)