1. Division of Gastroenterology and Hepatology; Mayo Clinic; Rochester MN USA
2. Drossman Gastroenterology; PLLC; UNC Center for Functional GI and Motility Disorders; Chapel Hill NC USA
3. Department of Palliative Care; Freiburg University Medical Center; Freiburg Germany
4. PRA Health Sciences; Salt Lake City UT USA
5. Department of Supportive and Palliative Care; The Royal Surrey County Hospital; Guildford Surrey UK
6. Department of Neurological Sciences; University of Vermont College of Medicine; Burlington VT USA