1. Department of Surgery, Federal University of Sao Paulo, Sao Paulo, Brazil.
2. Department of Surgery, University of Nebraska, Omaha, Nebraska.
3. Department of Surgery, Catholic University of Campinas, Campinas, Brazil.
4. Department of Surgery, University of South Florida, Tampa, Florida.
5. Department of Surgery, University of Padua, Padua, Italy.
6. Department of Thoracic Surgery, Virginia Mason Medical Center, Seattle, Washington.
7. Department of Surgery, Federal University of Rio Grande do Sul, Porto Alegre, Brazil.
8. Department of Medicine and Surgery, University of North Carolina, Chapel Hill, North Carolina.