Irritable Bowel Syndrome

• Center for Clinical and Basic Research (CCBR) — Ballerup Municipality, Denmark
• emovis GmbH — Berlin, Germany
• Digestive Diseases Center "Gastro" — Riga, Latvia
• Federal State Institution "Outpatient clinic #3" of President's Management Department of the Russian Federation — Moscow, Russia

• VA Puget Sound Health Care System — Seattle, Washington, United States

• Internetpsykatrienheten, M57, Psykiatri sydväst — Stockholm, Sweden

• Yonsei University College of Medicine, Gangnam Severance Hospital — Seoul, South Korea

• Sorlandet Sykehus HF — Kristiansand, Norway

Not specified

• Greater Baltimore Medical Cente — Baltimore, Maryland, United States

• University of North Carolina at Chapel Hill — Chapel Hill, North Carolina, United States

• Internetpsykatrienheten, M57, Psykiatri sydväst — Stockholm, Sweden

• Research Unit for General Practice, Department of gastroenterology, Odense University hospital — Odense, Denmark