Colonic Diseases, Functional

• Klinische Forschung Karlsruhe GmbH — Karlsruhe, Germany
• Istituto Clinico Humanitas — Rozzano, Milano, Italy
• Azienda Ospedaliero Universitaria Consorziale Policlinico di Bari — Bari, Italy
• Azienda Ospedaliero Universitaria di Bologna — Bologna, Italy

• UZ Antwerpen — Edegem, Antwerpen, Belgium
• ZOL (Ziekenhuis Oost-Limburg) — Genk, Limburg, Belgium
• UZ Gent — Ghent, Oost-Vlaanderen, Belgium
• AZ Sint-Elizabeth Zottegem — Zottegem, Oost-Vlaanderen, Belgium

• Neurologiska kliniken, Karolinska Universitetssjukhuset Solna — Stockholm, Sweden
• Gastrointestinal Physiology Unit, University College London Hospital — London, United Kingdom

• Ege University School of Medicine — Bornova, İzmir, Turkey (Türkiye)

• University of Mosul — Mosul, Ninevah, Iraq

• Northwestern Medicine Digestive Health Center — Chicago, Illinois, United States

• Peking University People's Hospital — Beijing, Beijing Municipality, China

• Mayo Clinic in Florida — Jacksonville, Florida, United States

• Dr. Ziauddin University Hospital Clifton — Karachi, Sindh, Pakistan

Not specified