1. Division of Thoracic and Foregut Surgery and the Minimally Invasive Surgery Center, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania
2. Department of General Surgery, Hadassah Hebrew University Medical Center Jerusalem, Israel
3. Department of Statistics, Haifa University, Israel
4. Department of Surgery, Minimally Invasive Surgery Center, Cedar Sinai Medical Center, Los Angeles, California
5. Department of Anesthesiology, Carmel Medical Center, Technion School of Medicine, Haifa, Israel