1. Department of Pathology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China.
2. Department of Pathology, Affiliated Hospital of Taishan Medical University, Taian, China.
3. Department of Pathology, Shandong University Cheeloo College of Medicine, Jinan, China.
4. Department of Internal Medicine, Kuma Hospital, Kobe, Japan.
5. Department of Surgery, Kuma Hospital, Kobe, Japan.
6. Department of Pathology and Laboratory Medicine, Nara Hospital, Kindai University Faculty of Medicine, Nara, Japan.