1. Department of Surgery Medical University of Vienna Vienna Austria
2. Department of Medicine Stanford University Redwood City California
3. Department of Internal Medicine Texas Tech University Health Sciences Center, Paul L. Foster School of Medicine El Paso Texas
4. Gastrointestinal Motility Center, Renaissance School of Medicine Stony Brook University Hospital Stony Brook New York
5. Minimally Invasive & Bariatric Surgery Stanford University School of Medicine Palo Alto California