Takehiro Izumo, Dept. of Endoscopy, National Cancer Center HospitalShinji Sasada, Department of Respiratory Medicine, Tokyo Saiseikai Central HospitalTomohiko Aso, Department of Radiological Techonology, National Cancer Center HospitalKazuko Nasu, Nursing Service Department, National Cancer Center HospitalYasuaki Arai, Department of Diagnostic Radiology, National Cancer Center HospitalChristine Chavez, Pulmonary Section, Departmetnt of Medicine, The Medical City, Pasig, Philippines