1. Department of Human Pathology, Graduate School and Faculty of Medicine, Tokyo Medical and Dental University, Tokyo, Japan
2. Division of Surgical Pathology, Tokyo Medical and Dental University Hospital, Tokyo, Japan
3. Universidade de Sao Paulo (USP), Hospital Universitario, Endoscopy Service, Sao Paulo, SP, Brazil
4. Laboratório Brasiliense, Brasília, DF, Brazil
5. Universidade de Sao Paulo (USP), Hospital Universitario, Anatomic Pathology Service, Sao Paulo, SP, Brazil