1. Department of Internal Medicine, Yamanashi Central Hospital, Kofu 400-8506, Japan
2. Clinical Laboratory Center, Yamanashi Central Hospital, Kofu 400-8506, Japan
3. Lung Cancer and Respiratory Disease Center, Yamanashi Central Hospital, Kofu 400-8506, Japan
4. Genome Analysis Center, Yamanashi Central Hospital, Kofu 400-8506, Japan
5. Department of Gastroenterology, The University of Tokyo, Tokyo 113-8655, Japan