1. Division of Colorectal Surgery; State University of New York; Stony Brook New York USA
2. Department of Colorectal Surgery; National Cancer Institute; Naples Italy
3. Department of Colorectal Surgery; Sechenov First Moscow State Medical University; Moscow Russia
4. Department of Colorectal Surgery; School University of Niš; Niš Serbia
5. Department of Pathology; State University of New York; Stony Brook New York USA