1. From the Divisions of Colon and Rectal Surgery (Ferrari, Violante, McKenna, Mathis, Dozois, Larson), Mayo Clinic, Rochester, MN
2. General Surgery Residency Program, University of Milan, Milan, Italy (Ferrari)
3. School of General Surgery, Alma Mater Studiorum Università di Bologna, Bologna, Italy (Violante).
4. Biostatistics (Day), Mayo Clinic, Rochester, MN