Oesophageal endoscopic ultrasound with fine needle aspiration improves and simplifies the staging of lung cancer - Kramer,H.; van Putten,J.W.; Post,W.J.; van Dullemen,H.M.; Bongaerts,A.H.; Pruim,J.; Suurmeijer,A.J.; Klinkenberg,T.J.; Groen,H.; Groen,H.J. (Thorax, 2004)