Functional Abdominal Pain

• Children's Nutrition Research Center — Houston, Texas, United States
• Texas Children's Hospital — Houston, Texas, United States

• Duke University Young Child Lab at Brightleaf Square — Durham, North Carolina, United States
• Duke Children's Primary Care Picket Road — Durham, North Carolina, United States

• University health care research center, Region Örebro county — Örebro, Sweden

• Instituto de Nutrición y Tecnología de los Alimentos, Universidad de Chile — Santiago, Chile

• Praxis und Tagesklinik Prof. Dr. med. Jens Papke — Neustadt, Saxony, Germany
• Universitätsklinikum Düsseldorf, Klinik für Allgemein-, Viszeral- und Kinderchirurgie — Düsseldorf, Germany
• Dr. med. Engelhard | Dr. med. Wihl, Internistische Gemeinschaftspraxis — Frankenberg, Germany
• Universitätsmedizin Greifswald Körperschaft des öffentlichen Rechts — Greifswald, Germany

• Boston Children's Hospital — Boston, Massachusetts, United States

• The University of Texas of Health Science Center at Houston — Houston, Texas, United States

Not specified

• Department of Clinical Neuroscience, Karolinska Institutet — Stockholm, Sweden

• UCLA Pediatric Pain Management Clinic — Los Angeles, California, United States