[1] Gifu Univ Hosp, Dept Internal Med 1, Gifu, Japan
[2] Natl Hosp Org, Nagara Med Ctr, Dept Pulm Med, Gifu, Japan
[3] Natl Hosp Org, Nagara Med Ctr, Dept Thorac Surg, Gifu, Japan
[4] Natl Hlth Insurance Sekigahara Hosp, Dept Internal Med, Gifu, Japan
[5] Univ Hamburg, Med Ctr, Dept Interdisciplinary Endoscopy, Hamburg, Germany